{{cite journal | last1=Khan | first1=M. A. | author2=R. H. Mirza | author3=M. Akhtar | author4=M. Mubeen | author5=M. Shakeel | author6=M. Irfan | year=2019 | title=FACTORS AFFECTING GROWTH PERFORMANCES OF SIMMENTAL, ANGUS, CHAROLAIS AND HEREFORD BEEF CROSSBRED CALVES UNDER SUB-TROPICAL ENVIRONMENT OF PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=29 | issue=2 | pages=396-401 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2019-JAPS-207}}