Freza-Olczyk, M. . (2018) „Bishop Conrad III of Kamień Pomorski: a common clergyman and a politician in the Duchy of Pomerania in 1233–1241”, Studia z Dziejów Średniowiecza, (22), s. 67–81. doi: 10.4467/25442562SDS.18.005.9807.