{{cite journal | last1=Ani | first1=A. O. | author2=A.U Okorie | year=2013 | title=EFFECTS OF PROCESSED CASTOR OIL BEAN (R ICINUS COMMUNIS L) MEAL AND SUPPLEMENTARY DL- METHIONINE ON NUTRIENT UTILIZATION BY BROILER CHICKS | journal=Journal of Animal and Plant Sciences | volume=23 | issue=5 | pages=1228-1235 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-503}}