Aktar, S., A. Bhuiyan, N. Saha, and M. Hoque. “Effect of Bull Performance on Progeny Early Growth and Genetic Relationships Between Bull and Progeny Traits”. Bangladesh Journal of Animal Science, vol. 40, no. 1-2, May 2012, pp. 1-7, doi:10.3329/bjas.v40i1-2.10620.