00778naa#a2200193#i#450# EN\\bibl\110898 20260412084418.7 1994-4683 20260225b2026####ek#y0engy0150####ca RU Transformation of the competitive activity of central forwards in modern water polo Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 6 с. Педагогическое образование. 44.03.01 local Journal article local Водные игры с мячом. Водное поло. 797.253 Ivchenko Elena Viktorovna Sidorov Sergey Sergeevich uchzapiski.lesgaft.spb.ru