1.
UmiƄski P. Potential Introduction of Flat Tax on Personal Income in the United States of America in 2007 and a Distribution of Revenue. EQUIL [Internet]. 2010 Dec. 1 [cited 2024 Jul. 23];5(2):221-3. Available from: https://apcz.umk.pl/EQUIL/article/view/EQUIL.2010.037