KOÅ›NIK, Anita. The essence of capital in economics. SPC Journal of Social Sciences, [S. l.], v. 2, n. 1, p. 14–17, 2020. DOI: 10.14419/jsc.v2i1.30539. Disponível em: https://sciencepubco.com/index.php/JSC/article/view/30539.. Acesso em: 13 aug. 2025.