Oro, J., and A. Р. Kimball (август 1961). “Synthesis of purines under possible primitive earth conditions. I. Adenine from hydrogen cyanide.” Archives of Biochemistry and Biophysics 94, стр. 217–227. Oro, J., and S. S. Kamat (апрель 1961). “Amino-acid synthesis from hydrogen cyanide under possible primitive earth conditions.” Nature 190 (4774), стр. 442–443. Oro, J. (Fox, S. W., ed.). Origins of Prebiological Systems and of Their Molecular Matrices. New York Academic Press, 1967, стр. 137.