{{cite journal | last1=Adinya | first1=I. B. | author2=D. Edet M. G. Nyienakuna | author3=G. U. Ikpi | year=2011 | title=ESTIMATION OF EFFICIENCY CONSTRAINTS USING COBB-DOUGLASS PRODUCTION FUNCTION IN SNAIL (Archachatina marginata) PRODUCTION BY SMALL FARMERS IN CROSS RIVER STATE, NIGERIA | journal=Journal of Animal and Plant Sciences | volume=21 | issue=2 | pages=274-282 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-218}}