{{cite journal | last1=Akmal | first1=M. | author2=M. S. Altaf | author3=R. Hayat | author4=F. U. Hassan | author5=M. Islam | year=2012 | title=TEMPORAL CHANGES IN SOIL UREASE, ALKALINE PHOSPHATASE AND DEHYDROGENASE ACTIVITY IN RAINFED WHEAT FIELD OF PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=22 | issue=2 | pages=457-462 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-236}}