Aleksandr N. Legotkin, Nikolay L. Ponomarev, V. D. P. L. A. Z. A. A. O. (2019). Exercise System for the Development of Student’s Motor Capacity. Opción, 35, 30-48. Recuperado a partir de https://www.produccioncientificaluz.org/index.php/opcion/article/view/24506