{"id":"003063329","type":"article","title":"Bull of Antipope John XXIII found in Mierzyn, Central Poland","publisher":"Zakład Narodowy im. Ossolińskich","publisher-place":"Lodz","pages":"131-145","container-title":"Fasciculi Archaeologiae Historicae. 35 (2022","author":[{"family":"Skóra","given":"Kalina"},{"family":"Strzyż","given":"Piotr"},{"family":"Szymczak","given":"Jan"}],"issued":{"raw":"2022"}}