“Zasada Nieretrokacji W Kodeksie Cywilnym (art. 3 k.C.): [The Principle of Non-Retroactivity in the Civil Code (art. 3 Comercial Code)]”. Studia Prawnicze / The Legal Studies, no. 3 (141) (September 30, 1999): 35–56. Accessed October 6, 2025. https://czasopisma.inp.pan.pl/index.php/sp/article/view/2819.