Ptak, Lenka, and Ilona Gwóźdź-Szewczenko. “On the Language Varieties of the Contemporary Czech Language in the Glottodidactic Process”. Linguistics, no. 13 (March 25, 2020): 159–170. Accessed September 13, 2025. https://ojs.academicon.pl/jezykoznawstwo/article/view/7888.