Ucuz, I., C. Ucar, H. Gurer, and S. Yildiz. “Hypothalamo-Pituitary-Adrenal Axis Activity and Related Factors in Adolescent During a Tennis Tournament”. Annals of Medical Research, vol. 27, no. 9, May 2021, pp. 2227-33, http://www.annalsmedres.org/index.php/aomr/article/view/967.