D. Zahraddeen, I. Butswat, D. Kalla, S. Sir, and M. Bukar, “Effect of Frequency of Ejaculation on Semen Characteristics in Two Breeds of Turkeys (Meleagris gallopavo) Raised in a Tropical Environment”, Int. J. Poult. Sci., vol. 4, no. 4, pp. 217–221, Mar. 2005, doi: 10.3923/ijps.2005.217.221.