LYDEKA, Zigmas. Economic System and its Change: Methodological Problems. Ekonomika, [S. l.], v. 45, p. 71–84, 1998. DOI: 10.15388/Ekon.1998.16475. Disponível em: https://www.zurnalai.vu.lt/ekonomika/article/view/16475. Acesso em: 20 apr. 2025.