Specific enzyme immunoassay for human chorionic gonadotropin using antibody against the synthetic peptide corresponding to the carboxyl terminal region of human chorionic gonadotropin beta Furuhashi, Y.; Sekiya, T.; Goto, S.; Kaseki, S.; Tomoda, Y. Acta Obstetrica et Gynaecologica Japonica (Japanese Edition) 33(12): 2336 1981 https://eurekamag.com/research/029/194/029194416.php