Cliek, Suleyman, and Mehmet Emin Tekin. “Estimation of Heritability and Repeatability of Milk Yield of Brown Swiss Cattle Reared in Ulas State Farm*”. The Indian Journal of Animal Sciences, vol. 76, no. 8, Feb. 2011, https://epubs.icar.org.in/index.php/IJAnS/article/view/4277.