{{cite journal | last1=Aksakal | first1=V. | author2=B. Bayram | author3=M. Yanar | author4=O. Akbulut | year=2012 | title=ESTIMATION OF VARIANCE COMPONENTS AND HERITABILITY OF BIRTH WEIGHT THROUGH DIFFERENT METHODS IN SWEDISH RED AND WHITE CATTLE | journal=Journal of Animal and Plant Sciences | volume=22 | issue=1 | pages=39-43 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-104}}