HAMAEKERS, Hubert. Prof. Wlodzimierz Nykiel 70: From Cooperation to Friendship. In: KUKULSKI, Ziemowit; SĘK, Małgorzata (eds.). Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II. Poland: Lodz University Press,2024. p. 39–43. DOI: 10.18778/8331-399-3.05. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3152. Acesso em: 15 feb. 2026.