Celik, H.Coskun, Omer Satici, and M.Yusuf Celik. 2021. “The Hierarchical Cluster Analysis of Variables About Attitudes of Chronic Smokers Among University Students ”. Annals of Medical Research 11 (4): 0217-22. http://www.annalsmedres.org/index.php/aomr/article/view/3075.