01261naa#a2200277#i#450# EN\\bibl\114010 20260429192119.3 1994-4683 20260429b2026####ek#y0engy0150####ca RU Leadership styles and professional identity of managers at different stages of professionalization: differences and a mathematical model of differentiation Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 7 с. Психологические науки. 37.00.00 Психология. 37.03.01 local Journal article local Психологические исследования. 159.9.07 Общая психология. 883 bbk Психология личности. 8837 bbk Психология. 83 tbk Общая психология. 831 tbk ПСИХОЛОГИЯ. 15.00 grnti Общая психология. 15.21 grnti Dmitrieva Yuliya Aleksandrovna Borisova Ol'ga Vladimirovna Koltunov Evgeniy Ivanovich uchzapiski.lesgaft.spb.ru