{{cite journal | last1=Ullah | first1=A. | author2=A. Shakeel | author3=T. A. Malik | author4=M. F. Saleem | year=2019 | title=ASSESSMENT OF DROUGHT TOLERANCE IN SOME COTTON GENOTYPES BASED ON DROUGHT TOLERANCE INDICES | journal=Journal of Animal and Plant Sciences | volume=29 | issue=4 | pages=998-1009 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2019-JAPS-412}}