{{cite journal | last1=Birmani | first1=N. A. | author2=A. M. Dharejo | author3=M. M. Khan. | year=2011 | title=CATATROPIS SP. (TREMATODA: NOTOCOTYLIDAE) FROM THE BLACK COOT, FULICA ATRA LINNAEUS, 1758 (GRUIFORMES: RALLIDAE) IN SINDH PROVINCE OF PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=21 | issue=4 | pages=NA | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-426}}