Essers P. The Importance of the Tax System for the Rule of Law. The Dutch Childcare Allowance Scandal as an Example of a Violation of the Rule of Law in a Constitutional Democracy. W: Kukulski Z, Sęk M, redaktorzy. Challenges of Contemporary Tax Law: Jubilee Book Dedicated to Professor Włodzimierz Nykiel. Volume II [Internet]. Poland: Wydawnictwo Uniwersytetu Łódzkiego; 2024 [cytowane 26 styczeń 2026]. s. 131-45. Dostępne na: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1154/chapter/3159