LYDEKA, Zigmas. The Twofoldedness of the Nature of Economic System. Ekonomika, [S. l.], v. 49, p. 39–50, 1999. DOI: 10.15388/Ekon.1999.16630. Disponível em: https://www.journals.vu.lt/ekonomika/article/view/16630.. Acesso em: 5 may. 2024.