VAN RAAD, Kees. Challenges in Teaching Tax Treaties. 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. 233–242. DOI: 10.18778/8331-399-3.19. Disponível em: https://press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3166. Acesso em: 15 feb. 2026.