{{cite journal | last1=Sakar | first1=E. | author2=S. Keskin | author3=H. Unver | year=2011 | title=USING OF FACTOR ANALYSIS SCORES IN MULTIPLE LINEAR REGRESSION MODEL FOR PREDICTION OF KERNEL WEIGHT IN ANKARA WALNUTS | journal=Journal of Animal and Plant Sciences | volume=21 | issue=2 | pages=182-185 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-214}}