Zasady: dobrej wiary i uczciwego obrotu oraz swobody umów w kodeksie zobowiązań oraz zasadach europejskiego prawa umów: [The principle of good faith and fair dealing as well as the principle of freedom of contract in the code of obligations and the principles of european contract law]. Studia Prawnicze / The Legal Studies, [S. l.], n. 4 (178), p. 51–58, 2008. DOI: 10.37232/sp.2008.4.3. Disponível em: https://czasopisma.inp.pan.pl/index.php/sp/article/view/3619. Acesso em: 6 oct. 2025.