hat
Zderic, Jan A. Carpio, Humberto; Ringold, HJ (Janvye 1959). "Estewoyid. CVI. Sentèz nan analòg 7β-Methyl anomali ". Journal of Sosyete Chimik Ameriken an. 81(2): 432-436.
eng
Zderic, John A.; Carpio, Humberto; Ringold, H. J. (January 1959). “Steroids. CVI. Synthesis of 7β-Methyl Hormone Analogs”. Journal of the American Chemical Society. 81(2): 432–436.