00554naa#a2200169#i#450# EN\\bibl\127418 20260709135919.4 1994-4683 20230930b2023####ek#y0engy0150####ca RU SPEED DEVELOPMENT 13-14YEAR OLD BOXERS Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 4 с. Journal article local Бокс. 796.83 Gorelkin Sergey Igorevich uchzapiski.lesgaft.spb.ru