SMILEY, Stafford. The U.S. – Poland Income Tax Treaty. 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. 281–288. DOI: 10.18778/8331-399-3.22. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3169. Acesso em: 29 jan. 2026.