Kukulski, Ziemowit, and Małgorzata Sęk, eds. Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II. Poland: Lodz University Press, 2024. Accessed January 22, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1154.