TY JOUR TI Features of assertive behavior in students with different achievement motivations KW assertive behavior KW assertiveness KW achievement motivation KW students JO Scientific notes of P. F. Lesgaft University AU Kibal'nik, A.V. AU Fedosova, I.V. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft