VAN RAAD, Kees. Challenges in Teaching Tax Treaties. W: KUKULSKI, Ziemowit; SĘK, Małgorzata (red.). Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II. Poland: Wydawnictwo Uniwersytetu Łódzkiego,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: 28 sty. 2026.