Rwuaan, J.S., P.I. Rekwot, P.A. Abdu, L.O. Eduvie, and J.A. Obidi. “Semen Characteristics of Vaccinated Shikabrown Cocks Challenged With a Velogenic Newcastle Disease Virus”. International Journal of Poultry Science 8, no. 9 (August 15, 2009): 896–901. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/1274.