Münnich M. Constitutional and Theoretical-Legal Problems Related to Introducing Changes in the Provisions of the Personal Income Tax Act Regulating the Principles of Taxation of Single Parents during the Tax Year. P&W [Internet]. 2023 Apr. 20 [cited 2026 Oct. 15];(1 (44):275-96. Available from: https://prawoiwiez.edu.pl/index.php/piw/article/view/485