Hamaekers H. Prof. Wlodzimierz Nykiel 70: From Cooperation to Friendship. In: Kukulski Z, Sęk M, editors. Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II [Internet]. Poland: Lodz University Press; 2024 [cited 2026 Feb. 10]. pp. 39-43. Available from: https://press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3152