WITCZAK, Hubert. The law of economic surplus in action systems. Research Papers in Economics and Finance, [S. l.], v. 9, n. 1, p. 81–102, 2025. DOI: 10.18559/ref.2025.1.1843. Disponível em: https://journals.ue.poznan.pl/REF/article/view/1843. Acesso em: 23 aug. 2025.