Kirpikov, A. ., A. . Baranov, and N.Y. Erofeeva. “Teenage Martial Arts Groups: Trainer’s Locus of Control Versus Trainees Self-Control Tests and Analyses”. 2021. Theory and Practice of Physical Culture, no. 11, Dec. 2021, pp. 66-68, http://tpfk.ru/index.php/TPPC/article/view/55.