LEWASZKIEWICZ, TADEUSZ. “The Issues of Standardization and Codification in the History of the Upper Sorbian and Lower Sorbian Languages”. Slavia Occidentalis, no. 75/1 (July 24, 2020): 185–198. Accessed July 17, 2024. https://pressto.amu.edu.pl/index.php/so/article/view/23777.