Turek, J. 2025. [REVIEW]: Jan Biskupiec, Tractatus contra sacra concilia, ed. by W. Zega, M. Zdanek, trans. by S. Sneddon, Folia Jagiellonica. Fontes, 26, Societas Vistulana, Cracow 2024, pp. LII + 118. Acta Mediaevalia. Series Nova. 2, (Dec. 2025), 327–330. DOI:https://doi.org/10.31743/amsn.18631.