%0 Journal Article %T Leadership styles and professional identity of managers at different stages of professionalization: differences and a mathematical model of differentiation %A Dmitrieva, Y.A. %A Borisova, O.V. %A Koltunov, E.I. %K psychology of professional activity, leadership styles, professional identity, coping behavior models, differentiation model, managers %J Scientific notes of P. F. Lesgaft University %D 2026 %N 0 %P 7 %I National State University of Physical Education, Sports and Health named after P.F. Lesgaft