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Ultraman Ultraman Zero Ultraman (nhân vật) Ultra Music Festival Ultraman Trigger: New Generation Tiga Ultratop 50 Singles Ultraman Z Ultramarathon Ultraman Taiga Ultra Zero FightTài liệu tham khảo
WikiPedia: Ultra_(tạp_chí) https://web.archive.org/web/20070101194103/http://... http://www.ultra-lehti.com/esittely.html https://web.archive.org/web/20160529100910/http://... http://ultra-lehti.com/UFOAIKA_1972_01.pdf/ https://web.archive.org/web/20070502000517/http://... http://www.suomenufotutkijat.fi/tutkimushistoriaa.... https://web.archive.org/web/20070928125225/http://... http://www.aikakaus.fi/default.asp?docId=14107&jas... https://www.worldcat.org/search?fq=x0:jrnl&q=n2:03... http://ultra-lehti.com/UFOAIKA_1972_01.pdf