Oró J, Kimball AP «Synthesis of purines under possible primitive earth conditions. I. Adenine from hydrogen cyanide». Archives of biochemistry and biophysics, 94, agost 1961, pàg. 217–27. DOI: 10.1016/0003-9861(61)90033-9. PMID: 13731263.
nih.gov
ncbi.nlm.nih.gov
Vera Reader (1930). "The assay of vitamin B4". Biochem J. 24 (6): 1827–31. PMC 1254803. PMID: 16744538
Oró J, Kimball AP «Synthesis of purines under possible primitive earth conditions. I. Adenine from hydrogen cyanide». Archives of biochemistry and biophysics, 94, agost 1961, pàg. 217–27. DOI: 10.1016/0003-9861(61)90033-9. PMID: 13731263.