For whatever reason the refs were cut off. It should say:
 Beyler et al (1960), Bismethylenedioxy Steroids. III. The Synthesis of 7α- and 7β-Methylhydrocortisones, J. Am. Chem. Soc. 82, 170.
 Campbell,J.A.,and Babc0ck,J.C. (1965), 7a-Methyltestosterones, a new class of potent anabolic agents, in Hormonal Steroids 2, 59-67