OZELAME, O.; DESSIMON MACHADO, J.A.; DE HEGEDUS, P. The systemic approach in extension: from hard system to soft systems. Agrociencia Uruguay, [S. l.], v. 6, n. 2, p. 53–60, 2002. DOI: 10.31285/AGRO.02.1376. Disponível em: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1376. Acesso em: 18 oct. 2025.