Ghaffar, A., M. Riaz, A. Ali, A. Jamil, T. Kamal, and G. Ali. “Genotyping of β-Lactoglobulin Gene in Pakistani Dairy Cattle (Sahiwal Breed) by Using PCR-RFLP”. PSM Veterinary Research, Vol. 2, no. 2, Nov. 2017, pp. 10-13, http://journals.psmpublishers.org/index.php/vetres/article/view/123.