KONDRASZUK, Tomasz. Simplified Income Tax System in the Czech Republic and Poland, with a Particular Emphasis on the Principles of Business Tax Records. Zeszyty Naukowe SGGW - Ekonomika i Organizacja Gospodarki Żywnościowej, Warszawa, Polska., n. 97, p. 249–262, 2012. DOI: 10.22630/EIOGZ.2012.97.57. Disponível em: https://eiogz.sggw.edu.pl/article/view/7959. Acesso em: 11 nov. 2026.