{{cite journal | last1=Khan | first1=F. U. | author2=F. Mohammad | year=2016 | title=APPLICATION OF STRESS SELECTION INDICES FOR ASSESSMENT OF NITROGEN TOLERANCE IN WHEAT (Triticum aestivum L.) | journal=Journal of Animal and Plant Sciences | volume=26 | issue=1 | pages=201-210 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2016-JAPS-26}}