SAPALA, Barbara. Iwona Dacka-Górzyńska, Joanna Partyka (ed.): OldPolish calendars. Folia Toruniensia, [S. l.], v. 14, p. 101–106, 2014. DOI: 10.12775/FT.2014.009. Disponível em: https://apcz.umk.pl/FT/article/view/FT.2014.009. Acesso em: 1 jan. 2025.