Petrenko, N.V., O.P. Petrenko, V.B. Romanova, and V.V. Ostapenko. “Analysis of the Functional State of Students in the Process of Healthy Training Exercises in Different Phases of the Ovarian-Menstrual Cycle”. Pedagogics, psychology, medical-biological problems of physical training and sports 21, no. 6 (November 5, 2017): 285-290. Accessed June 26, 2019. https://sportpedagogy.org.ua/index.php/PPS/article/view/822.