1.
Panic I. Duces opolienses domini in Ratibor. Revisiting the issue of the titles of duke Przemysław from Racibórz and time of formation of Racibórz and Cieszyn Duchys. WSN [Internet]. 2007 Dec. 30 [cited 2026 Nov. 15];5:82-94. Available from: https://journals.us.edu.pl/index.php/WSN/article/view/18693