{{cite journal | last1=Nasir | first1=Z. A. | author2=I. Colbeck | author3=Z. Ali | author4=S. Ahmed | year=2015 | title=HEAVY METAL COMPOSITION OF PARTICULATE MATTER IN RURAL AND URBAN RESIDENTIAL BUILT ENVIRONMENTS IN PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=25 | issue=3 | pages=NA | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-669}}