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Wollin, Goesta; William B.F. Ryan (May 16, 1979). "Synthesis of protein, nucleosides and other organic compounds from cyanamide and potassium nitrite under possible primitive earth conditions". Biochimica et Biophysica Acta (BBA) - General Subjects. 584 (3): 493–506. doi:10.1016/0304-4165(79)90122-3. PMID454677.