{{cite journal | last1=Li | first1=P.C. | author2=A.Z. Liu | author3=J.R. Liu | author4=C.S. Zheng | author5=M. Sun | author6=G.P. Wang | author7=Y | author8=B. Li | author9=X.H. Zhao | author10=H.L. Dong | year=2017 | title=EFFECT OF TIMING AND RATIO OF UREA FERTILIZATION ON 15N RECOVERY AND YIELD OF COTTON | journal=Journal of Animal and Plant Sciences | volume=27 | issue=3 | pages=929-939 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2017-JAPS-116}}