Rotengruber, P. 2019. The marginal morality (die Grenzen der Moral) as an ethical challenge and as the knowledge on how to gain competitive advantage. Annales. Etyka w Życiu Gospodarczym. 20, 5 (luty 2019), 21–31. DOI:https://doi.org/10.18778/1899-2226.20.5.02.