[1]Cvorakova,Hana;Holy,Antonin;Rosenberg,Ivan[CollectionofCzechoslovakChemicalCommunications,1994,vol.59,#9,p.2069-2094]
[1]Prabahar,K.Joseph;Ferris,JamesP.[JournaloftheAmericanChemicalSociety,1997,vol.119,#19,p.4330-4337]
Title: ORO J, et al. Synthesis of purines under possible primitive earth conditions. I. Adenine from hydrogen cyanide. Arch Biochem Biophys. 1961 Aug;94:217-27.
Title: Griffiths AJF, et al. An Introduction to Genetic Analysis. 7th edition. New York: W. H. Freeman; 2000. Structure of DNA.
Title: Reader V. The assay of vitamin B(4). Biochem J. 1930;24(6):1827-31.
