↑ Denzler, Brenda (2003). The lure of the edge: scientific passions, religious beliefs, and the pursuit of UFOs. University of California Press. tr. 6–7. ISBN0-520-23905-9.
↑ Schulgen, George (28 tháng 10 năm 1947). “Schulgen Memo”. Truy cập ngày 3 tháng 5 năm 2010. the object sighted is being assumed to be a manned aircraft, of Russian origin, and based on the perspective thinking and actual accomplishments of the Germans.
↑ “The Air Force Intelligence Report”. Truy cập ngày 3 tháng 5 năm 2010. To implement this policy it was directed that Hq, Air Material Command set up a project with the purpose of collecting, collating, evaluating, and distributing to interested government agencies and contractors, all information concerning sightings and phenomena in the atmosphere which could be construed to be of concern to the national security.
↑ GEIPAN stands for Groupe d'Études et d'Informations sur les Phénomènes Aérospatiaux Non-identifiés ("unidentified aerospace phenomenon research and information group")
↑ Vallee, Jacques (1965). Anatomy of a phenomenon: unidentified objects in space – a scientific appraisal. NTC/Contemporary Publishing. ISBN978-0809298884.
↑ McDonald, James. E. (1968). Statement on Unidentified Flying Objects submitted to the House Committee on Science and Astronautics at July 29, 1968, Symposium on Unidentified Flying Objects, Rayburn Bldg., Washington, D.D.
↑ Tuomela, Raimo (1985). Science, action, and reality. Springer. tr. 234. ISBN90-277-2098-3.
↑ Feist, Gregory J. (2006). The psychology of science and the origins of the scientific mind. Yale University Press. tr. 219. ISBN0-300-11074-X.
↑ Restivo, Sal P. (2005). Science, technology, and society: an encyclopedia. Oxford University Press US. tr. 176. ISBN0-19-514193-8.
↑ Cooper, Rachel (2009). “Chapter 1: Is psychiatric research scientific?”. Trong Broome, Matthew; Bortolotti, Lisa. Psychiatry as Cognitive Neuroscience: Philosophical Perspectives. Oxford University Press. tr. 19. ISBN0-19-923803-0.
↑ Friedman, Stanton T. (2008). Flying Saucers and Science: A Scientist Investigates the Mysteries of UFOs. Franklin Lakes, NJ: New Page Books. ISBN978-1-60163-011-7.
↑ Hynek, Josef Allen (tháng 4 năm 1953). “Unusual Aerial Phenomena”. Journal of the Optical Society of America 43 (4): 311–14. doi:10.1364/JOSA.43.000311.
↑ Josef Allen Hynek (6 tháng 8 năm 1952). “Special report on conferences with astronomers on unidentified aerial objects”. NARA. Truy cập ngày 25 tháng 5 năm 2007. Close questioning revealed they knew nothing of the actual sightings, of their frequency or anything much about them, and therefore cannot be taken seriously. This is characteristic of scientists in general when speaking about subjects which are not in their own immediate field of concern.
↑ Sturrock (2000) p. 155: "If the Air Force were to make available, say, $50 million per year for ten years for UFO research, it is quite likely that the subject would look somewhat less disreputable…however, an agency is unlikely to initiate such a program at any level until scientists are supportive of such an initiative. We see that there is a chicken-and-egg program. It would be more sensible, and more acceptable to the scientific community, if research began at a low level."
↑ Hynek, J. Allen (1974). The UFO experience: a scientific enquiry. Corgi. ISBN0-552-09430-7.
1 2 Tumminia, Diana G. (2007). Alien worlds: social and religious dimensions of extraterrestrial contact. Syracuse University Press. ISBN0-8156-0858-6.
↑ Vallée, Jacques F. (1998). “Physical Analyses in Ten Cases of Unexplained Aerial Objects with Material Samples”. Journal of Scientific Exploration12 (3): 360–61.
↑ Andrews, Colin; Spignesi, Stephen J. (2003). Crop circles: signs of contact. Career Press. ISBN1-56414-674-X.
↑ Howe, Linda Moulton (1989). Alien Harvest: Further Evidence Linking Animal Mutilations and Human Abductions to Alien Life Forms. Linda Moulton Howe Productions. ISBN0-9620570-1-0.
↑ Friedman, Stanton T.; Berliner, Don (1992). Crash at Corona: The U.S. Military Retrieval and Cover-up of a UFO. Paragon House. ISBN1-55778-449-3.
↑ Randle, Kevin D.; Schmitt, Donald R. (1991). UFO Crash at Roswel. Avon Books. ISBN0-380-76196-3.
↑ Friedman, Stanton T. (1997). TOP SECRET/MAJIC. Marlowe & Co. ISBN1-56924-741-2.
↑ Salla, Michael (2004). Exopolitics: Political Implications of Extraterrestrial Presence. Dandelion Books. ISBN1-893302-56-3.
↑ Greer, Steven M. (2001). Disclosure: Military and Government Witnesses Reveal the Greatest Secrets in Modern History. Crossing Point. ISBN0-9673238-1-9.
1 2 3 Sheaffer, Robert. "A Skeptical Perspective on UFO Abductions". In: Pritchard, Andrea & Pritchard, David E. & Mack, John E. & Kasey, Pam & Yapp, Claudia. Alien Discussions: Proceedings of the Abduction Study Conference. Cambridge: North Cambridge Press. pp. 382–88.
↑ Herb, Gert & J. Allen Hynek (tháng 5 năm 2006). “The Amateur Astronomer and the UFO Phenomena”. reprint 30 (3). International UFO Reporter. tr. 14–16.
↑ United States Air Force (27 tháng 4 năm 1949). “USAF Briefing Report”. Truy cập ngày 4 tháng 5 năm 2010. The majority of reported incidents have been caused by misidentification of weather balloons, high altitude balloons with lights or electronic equipment, meteors, Bolides, and celestial bodies.
↑ United States Air Force (27 tháng 4 năm 1949). “USAF Briefing Report”. Truy cập ngày 4 tháng 5 năm 2010. There are numerous reports from reliable and competent observers for which a conclusive explanation has not been possible. Some of these involve descriptions which would place them in the category of new manifestations of probable natural phenomena, but others involve configurations and described performance which might conceivably represent an advanced aerodynamical development.
↑ Lt. Col. George D. Garrett, USAF. (30 tháng 7 năm 1947). “Flying discs. Summary of 16 UFO cases.”. Truy cập ngày 4 tháng 5 năm 2010. This "flying saucer" situation is not all imaginary or seeing too much in some natural phenomenon. Something is really flying around.
↑ United States Air Technical Intelligence Center (5 tháng 5 năm 1955). “Project Blue Book Special Report NO. 14: Analysis of Reports of Unidentified Aerial Objects. Project No. 10073.”. Truy cập ngày 4 tháng 5 năm 2010. The danger lies in the possibility of forgetting the subjectivity of the data at the time that conclusions are drawn from the analysis. It must be emphasized, again and again, that the conclusions contained in this report are based NOT on facts, but on what many observers thought and estimated the true facts to be.
↑ Edward U.Condon (1968). “Scientific Study of Unidentified Flying Objects”. Truy cập ngày 4 tháng 5 năm 2010. Our general conclusion is that nothing has come from the study of UFOs in the past 21 years that has added to scientific knowledge. Careful consideration of the record as it is available to us leads us to conclude that further extensive study of UFOs probably cannot be justified in the expectation that science will be advanced thereby.
↑ GEIPAN, CNES (8 tháng 4 năm 2010). “GEIPAN statistics” (bằng tiếng French). Bản gốc lưu trữ ngày 13 tháng 4 năm 2010. Truy cập ngày 4 tháng 5 năm 2010. Bảo trì CS1: Ngôn ngữ không rõ (link)
↑ Jean-Jacques Vélasco & Nicolas Montigiani (2004). OVNIS l'Evidence (bằng tiếng Pháp). Chatou – New York, Carnot, « Orbis enigma ». ISBN2-84855-054-6.
↑ Dolan, Richard M. (2008). UFOs and the National Security state – the cover-up exposed 1973-1991. Keyhole Publishing. tr. 143–44. ISBN978-0-9677995-1-3.
↑ UN (18 tháng 12 năm 1978). “Recommendation to Establish UN Agency for UFO Research – UN General Assembly decision 33/426”. Truy cập ngày 4 tháng 5 năm 2010. the General Assembly invites interested Member States to take appropriate steps to coordinate on a national level scientific research and investigation into extraterrestrial life, including unidentified flying objects, and to inform the Secretary-General of the observations, research and evaluation of such activities.
↑ Erling Strand. “Project Hessdalen 1984 – Final Technical Report”. Truy cập ngày 4 tháng 5 năm 2010. Beside the light measurements, it can be "measured" by radar and laser. Perhaps the measurements we did on the magnetograph and spectrum analyser are due to this phenomenon as well. We have to do more measurements with these instruments, before we can be sure of that.
↑ Erling Strand. “Project Hessdalen 1984 – Final Technical Report”. Truy cập ngày 4 tháng 5 năm 2010. We have not found out what this phenomenon is. That could hardly be expected either. But we know that the phenomenon, whatever it is, can be measured.
↑ Massimo Teodorani, Gloria Nobili (2002). “EMBLA 2002 – An Optical and Ground Survey in Hessdalen” (PDF). tr. 16. Truy cập ngày 4 tháng 5 năm 2010. Whatever these things are, if some "alien intelligence" is behind the Hessdalen phenomenon, that hypothetical intelligence has shown no interest in searching a direct, continuative and structurally evolved communication with mankind and went on behaving in such a way that the light-phenomenon itself appears to be totally elusive.
↑ Ministry of Defense (tháng 12 năm 2000). “Unidentified Aerial Phenomena in the UK Air Defence Region: Executive Summary” (PDF). tr. 4. Truy cập ngày 5 tháng 5 năm 2010. That UAP exist is indisputable …[they] clearly can exhibit aerodynamic characteristics well beyond those of any known aircraft or missile – either manned or unmanned.
↑ David F. Salisbury (1 tháng 7 năm 1998). “No evidence of ET: Panel calls for more scientific UFO research”. Stanford Online Report. Truy cập ngày 5 tháng 5 năm 2010. The upshot of this was that, far from supporting Condon's conclusions, I thought the evidence presented in the report suggested that something was going on that needed study.
↑ Sturrock et al (1998) p. 180: "...but there was no convincing evidence pointing to unknown physical processes or to the involvement of extraterrestrial intelligence.", "...it would be valuable to carefully evaluate UFO reports since, whenever there are unexplained observations..."
↑ Sturrock et al (1998) p. 180: "...it would be valuable to carefully evaluate UFO reports since, whenever there are unexplained observations, there is the possibility that scientists will learn something new by studying these observations."
↑ COMETA Report, part 2 (tháng 7 năm 1999). “UFOs and Defense: What Should We Prepare For?” (PDF). ufoevidence.org. tr. 38. Bản gốc (PDF) lưu trữ ngày 16 tháng 7 năm 2009. Truy cập ngày 5 tháng 5 năm 2010. [...] almost certain physical reality of completely unknown flying objects [...], apparently operated by intelligent [beings].", "A single hypothesis sufficiently takes into account the facts [...] It is the hypothesis of extraterrestrial visitors."
