{{cite journal | last1=Aziz | first1=K. | author2=Z. Ali | author3=Z. A. Nasir | author4=I. Colbeck | year=2015 | title=COMPARATIVE STUDY OF PARTICULATE MATTER IN THE TRANSPORT MICROENVIRONMENT (BUSES) OF PAKISTAN AND UK | journal=Journal of Animal and Plant Sciences | volume=25 | issue=3 | pages=370-377 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-657}}