Zahraddeen, D., et al. “Effect of Frequency of Ejaculation on Semen Characteristics in Two Breeds of Turkeys (Meleagris Gallopavo) Raised in a Tropical Environment”. International Journal of Poultry Science, vol. 4, no. 4, Mar. 2005, pp. 217–221, https://doi.org/10.3923/ijps.2005.217.221.