NASR, JAVD, AKBAR YAGHOBFAR, YAHYA EBRAHIMNEZHAD, and KAMBIZ NAZERADL. 2012. “Increasing Lysine and Methionine Density Improves Broiler Breeder Performance”. The Indian Journal of Animal Sciences 82 (4). http://epubs.icar.org.in/index.php/IJAnS/article/view/16698.