{{cite journal | last1=Ser | first1=G. | author2=A. Yeşilova | author3=A. Yılmaz | year=2013 | title=COMPARING COVARIANCE STRUCTURES using DIFFERENT OPTIMIZATION TECHNIQUES in GLMM on SOME SEXUAL BEHAVIORS of MALE LAMBS | journal=Journal of Animal and Plant Sciences | volume=23 | issue=6 | pages=1583-1587 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-617}}