{{cite journal | last1=Wadood | first1=F. | author2=M. Aleem | author3=A. Ijaz | author4=N. Ahmad | author5=M. S. Yousaf | author6=D. H. Mughal | author7=A. Javid 8and S. A. Mahmood | year=2015 | title=EFFECT OF L-CYSTEINE ON POST THAW QUALITY OF NILI RAVI BUFFALO (BUBALUS BUBALIS) BULL SPERMATOZOA CRYOPRESERVED IN TRIS CITRIC ACID EXTENDER | journal=Journal of Animal and Plant Sciences | volume=25 | issue=1 | pages=301-303 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-42}}