{{cite journal | last1=Manzoor | first1=S. | author2=R. Saif | author3=H. Sadia | author4=S. Firyal | author5=M. Tayyab | author6=M. Mansha | author7=A. K. Mahmood | author8=A. S. Hashmi A. R. Awan | author9=M. Wasim | year=2019 | title=MOLECULAR EXPRESSION OF CYCLIN DEPENDENT KINASE INHIBITOR (p21) I N CANINE TUMORS | journal=Journal of Animal and Plant Sciences | volume=29 | issue=4 | pages=1127-1134 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2019-JAPS-424}}