Łukowski, Łukasz, and Bartosz Żukowski. “Principles of so-Called „material” and „formal” Truth. A Logical, Philosophical and Juridical Analysis”. Acta Universitatis Lodziensis. Folia Iuridica, no. 73 (January 1, 2014): 49–61. Accessed February 10, 2026. https://czasopisma.uni.lodz.pl/Iuridica/article/view/20160.