00682naa#a2200181#i#450# EN\\bibl\106258 20260208132255.7 1994-4683 20260129b2026####ek#y0engy0150####ca RU Comparative analysis of technical actions of football players aged 8–15 years in 4×4 and 8×8 game conditions Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 6 с. Journal article local Футбол. 796.332 Korzhukov Aleksey Viktorovich Gillard Marina Vladimirovna uchzapiski.lesgaft.spb.ru