{{cite journal | last1=Awan | first1=T. H. | author2=R. I. Ali | author3=Z. Manzoor | author4=M. Ahmad | author5=M. Akhtar | year=2011 | title=EFFECT OF DIFFERENT NITROGEN LEVELS AND ROW SPACING ON THE PERFORMANCE OF NEWLY EVOLVED MEDIUM GRAIN RICE VARIETY, KSK-133 | journal=Journal of Animal and Plant Sciences | volume=21 | issue=2 | pages=231-234 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-236}}