Kukulski, Ziemowit, and Małgorzata Sęk, eds. “Prof. Hab. Dr. Włodzimierz Nykiel, Dr. h.C”. In Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II, 11–21. Poland: Lodz University Press, 2024. Accessed February 8, 2026. https://press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3149.