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Schlesinger N (March 2010). "Diagnosing and treating gout: a review to aid primary care physicians". Postgrad Med. 122 (2): 157–61. doi:10.3810/pgm.2010.03.2133. PMID20203467.
Sanchez RA, Ferris JP, Orgel LE (December 1967). "Studies in prebiotic synthesis. II. Synthesis of purine precursors and amino acids from aqueous hydrogen cyanide". Journal of Molecular Biology. 30 (2): 223–253. doi:10.1016/S0022-2836(67)80037-8. PMID4297187.
Schlesinger N (March 2010). "Diagnosing and treating gout: a review to aid primary care physicians". Postgrad Med. 122 (2): 157–61. doi:10.3810/pgm.2010.03.2133. PMID20203467.