Qui se omnes periculis maris comittentes in lyvoniam devenerunt : On the History of the Sea Voyages to Livonia at the Turn of the 12th and the 13th Century as Presented in the Chronicle by Henry the Lettish - Simiński, Rafał (. Studia maritima. - Szczecin : Wydawn. Naukowe Uniwersytetu Szczecińskiego, 1978-. - ISSN 0137-3587 14, 2001)