http://www.saber.ula.ve/handle/123456789/4671 1999 Wed, 06 May 2026 08:54:13 GMT 2026-05-06T08:54:13Z http://www.saber.ula.ve/handle/123456789/22599 The logistic equation with concave birth rate. Tineo, Antonio Rafael Wed, 10 May 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22599 2006-05-10T09:00:00Z http://www.saber.ula.ve/handle/123456789/22600 Notas de Matemática Wed, 10 May 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22600 2006-05-10T09:00:00Z