{{cite journal | last1=Qureshi | first1=S. | author2=T. Faisal1and M. K. Saleemi | author3=M. Z. Ali | year=2017 | title=HISTOLOGICAL AND HISTOMETRIC ALTERATIONS IN THE DIGESTIVE TRACT AND ACCESSORY GLANDS OF DUCK (Anasplatyrhynchos) WITH SEX AND PROGRESSIVE AGE | journal=Journal of Animal and Plant Sciences | volume=27 | issue=5 | pages=1528-1533 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2017-JAPS-193}}