P. Váczi, A. Müller, and Éva Bácsné Bába, “EFFECT OF COVID-19 CORONAVIRUS ON MAJOR NORTH EFFECT OF COVID-19 CORONAVIRUS ON MAJOR NORTH AMER-ICAN SPORTS LEAGUESAMER-ICAN SPORTS LEAGUES”, ACR, vol. 11, no. 1, pp. 157–166, Jul. 2021, doi: 10.33032/acr.2587.