00778naa#a2200181#i#450# EN\\bibl\100923 20251012071436.7 1994-4683 20250925b2025####ek#y0engy0150####ca RU Stages and phases of the development of sports mastery of football players from the perspective of age characteristics in the context of competitive activity Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2025 7 с. Journal article local Футбол. 796.332 Методические основы видов спорта. 77.29 grnti Lavrichenko Vladislav Valer'evich uchzapiski.lesgaft.spb.ru