@misc{Porada_Zbigniew_The_2019,
 author={Porada, Zbigniew and Kałamacka, Ewa},
 type={article},
 publisher={The Stanislaw Podobinski Publishing House of the Jan Długosz University in Czestochowa},
 title={The contribution of baron de Coubertin to the organization of olympic art competitions},
 address={Częstochowa},
 year={2019},
 language={pol},
}