{{cite journal | last1=Qureshi | first1=M. A. | author2=H. Shahzad | author3=Z. Imran | author4=M. Mushtaq | author5=N. Akhtar M. A. Ali | author6=F. Mujeeb | year=2013 | title=POTENTIAL OF RHIZOBIUM SPECIES TO ENHANCE GROWTH AND FODDER YIELD OF MAIZE IN THE PRESENCE AND ABSENCE OF L-TRYPTOPHAN | journal=Journal of Animal and Plant Sciences | volume=23 | issue=5 | pages=1448-1454 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-536}}