00751naa#a2200205#i#450# EN\\bibl\111577 20260115213613.4 1994-4683 20250913b2025####ek#y0engy0150####ca RU Monitoring the psychological preparedness of high-class athletes in beach volleyball Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2025 4 с. Journal article local Волейбол. 796.325 Kostyukov Vladimir Vasil'evich Dement'eva Irina Mihaylovna Kostyukova Olga Nikolaevna Tyutyunnikov Andrey Sergeevich uchzapiski.lesgaft.spb.ru