ROSSBACH, S. The Spiritual Foundations of Modem Systems Theory: Niklas Luhmann’s libertas indifferentiae. Arc: The Journal of the School of Religious Studies, [S. l.], v. 31, p. 165–191, 2003. DOI: 10.26443/arc.v31i.992. Disponível em: https://arcjournal.library.mcgill.ca/article/view/992. Acesso em: 5 dec. 2025.