Bohlen J.G., Held J.P., Sanderson M.O. The male orgasm: pelvic contractions measured by anal probe. Archives of Sexual Behavior. 1980; 9(6): 503–521. См. также: Bohlen J., Held J., Sanderson M., Ahlgren A. The female orgasm: Pelvic contractions. Archives of Sexual Behavior. 1982; 11(5): 367–386.
