Lerner LJ (1989). "Development of novel embryotoxic compounds for interceptive fertility control in the dog". Journal of Reproduction and Fertility. Supplement. 39: 251–65. PMID2621727.
Wanke R, Hermanns W (January 1989). "Adverse effects of the antifertility agent DL 717-IT (Canocenta, Byk Gulden, FRG). Pathological findings in the rabbit". Research Communications in Chemical Pathology and Pharmacology. 63 (1): 69–80. PMID2916081.