Martins, Zita; Botta, Oliver; Fogel, Marilyn L.; Sephton, Mark A.; Glavin, Daniel P.; Watson, Jonathan S.; Dworkin, Jason P.; Schwartz, Alan W. et al. (15 June 2008). "Extraterrestrial nucleobases in the Murchison meteorite". Earth and Planetary Science Letters270 (1–2): 130–136. doi:10.1016/j.epsl.2008.03.026. Bibcode: 2008E&PSL.270..130M.
harvard.edu
adsabs.harvard.edu
Martins, Zita; Botta, Oliver; Fogel, Marilyn L.; Sephton, Mark A.; Glavin, Daniel P.; Watson, Jonathan S.; Dworkin, Jason P.; Schwartz, Alan W. et al. (15 June 2008). "Extraterrestrial nucleobases in the Murchison meteorite". Earth and Planetary Science Letters270 (1–2): 130–136. doi:10.1016/j.epsl.2008.03.026. Bibcode: 2008E&PSL.270..130M.
ClarkExpression error: Unrecognized word "etal". (2012). "The Surface Composition of Titan". American Astronomical Society (Smithsonian/NASA Astrophysics Data System) 44. Bibcode: 2012DPS....4420102C.
hathitrust.org
babel.hathitrust.org
Robert Behrend (1885) "Versuche zur Synthese von Körpern der Harnsäurereihe" (யூரிக்கமிலத் தொடர்களைத் தயாரிக்கும் ஆய்வு), Annalen der Chemie, 229 : 1-44. பக்கம் 11: "Dasselbe stellt sich sonach als Methylderivat der Verbindung: [யுராசிலின் மூலக்கூற்றமைப்பு]