{{cite journal | last1=Channa | first1=A. A. | author2=M. Aleem | author3=M. A. Jabbar | author4=H. Monir | author5=N. Ahmad1 | year=2020 | title=FERTILITY OF LACTATING JERSEY X HOLSTEIN-FRIESIAN COWS IN SUBTROPICAL REGION SUBMITTED TO A DOUBLE-OVSYNCH VERSUS OVSYNCH PROTOCOL FOR TIMED ARTIFICIAL INSEMINATION | journal=Journal of Animal and Plant Sciences | volume=30 | issue=1 | pages=255-258 | doi=10.36899/JAPS.2020.1.0030 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AS-18-0055}}