Cacciari, Barbara; Manfrinato, Maria; Trentini, Alessandro; Kennedy, John. Schematic overview of oligosaccharides, with survey on their major physiological
Constellations: Ursa Major(页面存档备份,存于互联网档案馆) AAVSO: The Myths of Ursa Major(页面存档备份,存于互联网档案馆) The Origin of the Greek Constellations Star Tales – Ursa Major(页面存档备份,存于互联网档案馆)
(原始内容存档于2018-02-11). Leachman, Shelly. Another Major Breakthrough. University of California, Santa Barbara. December 5, 2016 [December 5, 2016]. (原始内容存档于2018-02-03)
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