http://www.saber.ula.ve/handle/123456789/4718 2000 Fri, 15 May 2026 11:19:15 GMT 2026-05-15T11:19:15Z http://www.saber.ula.ve/handle/123456789/22694 Stable periodic orbits for a predator - prey model with delay. Cavani, Mario; Lizana Peña, Marcos; Smith, Hal L. Thu, 08 Jun 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22694 2006-06-08T09:00:00Z http://www.saber.ula.ve/handle/123456789/22693 Notas de Matemática Thu, 08 Jun 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22693 2006-06-08T09:00:00Z