Tài liệu tham khảo

WikiPedia: Kem đông khô http://www.livescience.com/blogs/2006/09/16/orbita... http://www.universetoday.com/62600/astronaut-ice-c... http://lsda.jsc.nasa.gov/lsda_data/nra_research_da... http://liftoff.msfc.nasa.gov/academy/astronauts/fo... http://www.sti.nasa.gov/tto/ http://www.nasa.gov/audience/foreducators/k-4/feat... http://www.spacetoday.org/SpcShtls/AstronautsEat.h... https://www.youtube.com/watch?v=E36F4XG5zcY https://airandspace.si.edu/exhibitions/apollo-to-t... https://web.archive.org/web/19970607053139/http://...