Obidi, J.; Onyeanusi, B.; Ayo, J.; Rekwot, P.; Dzenda, T. Determination of Gonadal Sperm Spermatid Reserves in Shikabrown Breeder Cocks. Int. J. Poult. Sci. 2008, 7 (12), 1200–1203. https://doi.org/10.3923/ijps.2008.1200.1203.