V. Vatsalya and K. L. Arora, “Allometric Growth of Testes in Relation to Age, Body Weight and Selected Blood Parameters in Male Japanese Quail (Coturnix japonica)”, Int. J. Poult. Sci., vol. 11, no. 4, pp. 251–258, Mar. 2012, doi: 10.3923/ijps.2012.251.258.