00744naa#a2200193#i#450# EN\\bibl\111576 20260114200945.3 1994-4683 20250913b2025####ek#y0engy0150####ca RU The problem of early specialization and the formation of children's readiness for initial hockey lessons Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2025 3 с. Journal article local Хоккей на льду с шайбой. 796.966 Kozin Vadim Vital'evich filatov viktor vladimirovich Filatov Yuriy Vladimirovich uchzapiski.lesgaft.spb.ru