Notas de Matemática - N° 226 http://www.saber.ula.ve/handle/123456789/4731 2003 2026-05-27T12:22:12Z Weak open sets: a presentation using operators. http://www.saber.ula.ve/handle/123456789/22720 Weak open sets: a presentation using operators. Colasante Martínez, María Luisa 2006-06-13T09:00:00Z Notas de Matemática http://www.saber.ula.ve/handle/123456789/22719 Notas de Matemática 2006-06-13T09:00:00Z