“Economic Benefit in Repeat Breeder Cows Using Intrauterine Infusion of Penicillin and Estrus Synchronization Followed by Timed Artificial Insemination”. Journal of Advanced Veterinary and Animal Research 5, no. 4 (December 29, 2018): 454–458. Accessed July 3, 2026. https://www.banglajol.info/index.php/JAVAR/article/view/39511.