{{cite journal | last1=Arif | first1=M. | author2=M. Sarwar | author3=Mehr-un-Nisa | author4=Z. Hayat | author5=M. Younas | year=2016 | title=EFFECT OF SUPPLEMENTARY SODIUM NITRATE AND SULPHUR ON METHANE PRODUCTION AND GROWTH RATES IN SHEEP AND GOATS FED FORAGE BASED DIET LOW IN TRUE PROTEIN | journal=Journal of Animal and Plant Sciences | volume=26 | issue=1 | pages=69-78 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2016-JAPS-10}}