00678naa#a2200193#i#450# EN\\bibl\127729 20260721121302.2 1994-4683 20231130b2023####ek#y0engy0150####ca RU DIFFERENTIATED APPROACH TO THE DEVELOPMENT OF HIGH-SPEED QUALITIES OFFOOTBALL PLAYERS AGED 14-15 Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 7 с. Journal article local Футбол. 796.332 Sirakovskaya Yana Vadimovna Kuznetsov B V SHukin S N uchzapiski.lesgaft.spb.ru