{{cite journal | last1=Khan | first1=M. Z. U. | author2=T. N. Pasha | author3=K. Javed | author4=M. J. Basra | author5=M. A. Jabbar | year=2020 | title=EFFECT OF VARYING DIETARY LEVELS OF CALCIUM AND PHOSPHORUS ON APPARENT DIGESTIBILITY AND RETENTION OF MACRO AND MICRO-MINERALS IN LACTATING SAHIWAL COWS | journal=Journal of Animal and Plant Sciences | volume=30 | issue=3 | pages=527-536 | doi=10.36899/JAPS.2020.3.0062 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AS-18-0064}}