Polak, M. (2023) “Sigismund Augustus’ envoys and letters of credence to the Habsburgs. an attempt to list them on the basis of the sources in the Haus-, Hof- und Staatsarchiv in Vienna”, Czasopismo Prawno-Historyczne, 75(2), pp. 241–263. doi: 10.14746/cph.2023.2.13.