MARTINEZ DUARTE, Juan A. Systemic focus in the research of hydrographic basins. Scientific Journal Visión de Futuro, [S. l.], v. 5, n. 1, 2005. Disponível em: https://revistacientifica.fce.unam.edu.ar/index.php/visiondefuturo/article/view/683. Acesso em: 18 may. 2024.