00664naa#a2200181#i#450# EN\\bibl\125021 20260815013831.6 1994-4683 20260814b2026####ek#y0engy0150####ca RU Motivation and incentives in 15–16-year-old female volleyball players under competitive stress Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 8 с. Journal article local Волейбол. 796.325 Morozov Oleg Sergeevich Kulagina Snezhanna Yurievna uchzapiski.lesgaft.spb.ru