{{cite journal | last1=Fakhar-i-Abbas | author2=Thomas P. Rooney | author3=Jibran Haider | author4=Afsar Mian Bioresource Research Centre | year=2013 | title=FOOD LIMITATION AS A POTENTIALLY EMERGING CONTRIBUTOR TO THE ASIAN VULTURE CRISIS | journal=Journal of Animal and Plant Sciences | volume=23 | issue=6 | pages=1758-1760 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-643}}