R. C. Sinha, A. -Al-Maruf, A. kumar kundu, M. A. Rahman, M. T. Islam, and M. Abdullah-Al Mamun, “Determination of reproductive parameters of sows at rural areas of Bangladesh”, J. Adv. Vet. Anim. Res, vol. 2, no. 1, pp. 74–79, Dec. 2014.