For citations:
Frolov R.P. Economic and mathematical modeling of evaluating the effectiveness of sports and fitness organizations during the crisis. Kazan economic vestnik. 2023;(3):24-29. (In Russ.)
Frolov R.P. Economic and mathematical modeling of evaluating the effectiveness of sports and fitness organizations during the crisis. Kazan economic vestnik. 2023;(3):24-29. (In Russ.)