TY JOUR TI The influence of personal marketing on the effectiveness of a coach's activity in a children's football team KW coaches KW professional activity KW children's football club KW personal marketing JO Scientific notes of P. F. Lesgaft University AU Myakonkov, V.B. AU Malyshev, A.V. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft