Hamaekers, H. (2024). Prof. Wlodzimierz Nykiel 70: From Cooperation to Friendship. In Z. Kukulski & M. Sęk (Eds.), Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II (pp. 39-43). Lodz University Press. https://doi.org/10.18778/8331-399-3.05