S. Kuchits, O. Gridnev, E. Pesennikova, G. Gildeeva, and D. Andreeva, “Comparative research of job satisfaction among the doctor personnel in the Russian federation, under conditions of ‘performance-based contract of employment’”, J. Hum. Sport Exerc., vol. 14, no. 5proc, pp. S2103-S2115, Dec. 2019.