{{cite journal | last1=B. | first1=I. | author2=Adinya | author3=B. O. Offem | author4=G. U. Ikpi | year=2011 | title=APPLICATION OF A STOCHASTIC FRONTIER PRODUCTION FUNCTION FOR  MEASUREMENT AND COMPARISION OF TECHNICAL EFFICIENCY OF MANDARIN FISH AND CLOWN FISH PRODUCTION IN LOWLANDS RESERVOIRS, PONDS AND DAMS OF CROSS RIVER STATE, NIGERIA | journal=Journal of Animal and Plant Sciences | volume=21 | issue=3 | pages=595-600 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-323}}