{{cite journal | last1=Khan | first1=H. M. | author2=M. Ashraf | author3=A. S. Hashmi | author4=M. U. D. Ahmad | author5=A. A. Anjum | year=2013 | title=PAPAIN INDUCED PROGRESSIVE DEGENERATIVE CHANGES IN ARTICULAR CARTILAGE OF RAT FEMOROTIBIAL JOINT AND ITS HISTOPATHOLOGICAL GRADING | journal=Journal of Animal and Plant Sciences | volume=23 | issue=2 | pages=350-358 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-203}}