FRANZEN, Winfried. Altrusim and Morals. In: MANSFELD, Monika. Practica et Speculativa: Studies Offered to Professor Andrzej M. Kaniowski. Poland: Lodz University Press,2022. p. 393–413. DOI: 10.18778/8220-570-1.20. Disponível em: https://press.uni.lodz.pl/index.php/wul/catalog/book/756/chapter/1836. Acesso em: 15 feb. 2026.