Drozd, Roman. “The Issue of Akcja ‘Wisła’ in the Activities of the Association of Lemkos in Poland (OLP) Throughout 1990-2003”. Modern Historical and Political Issues, no. 35-36 (December 20, 2017): 182–191. Accessed May 19, 2024. https://mhpi.chnu.edu.ua/index.php/issues/article/view/88.