Хорошуха Михайло Федорович (Mykhailo K. Spiritual and salutary effects of tempering of young athletes by the nature on the system of Porfiry Ivanov (as from the twenty-five years of experience of the author). SHSS [Internet]. 2015Dec.1 [cited 2024May1];(6(50):182-7. Available from: https://journals.uran.ua/index.php/1991-0177/article/view/56789