Zasada nieretrokacji w kodeksie cywilnym (art. 3 k.c.): [The principle of non-retroactivity in the Civil Code (art. 3 Comercial Code)]. SP [Internet]. 1999 Sep. 30 [cited 2025 Oct. 6];(3 (141):35-56. Available from: https://czasopisma.inp.pan.pl/index.php/sp/article/view/2819