http://www.saber.ula.ve/handle/123456789/4591 1991 Wed, 27 May 2026 17:56:02 GMT 2026-05-27T17:56:02Z http://www.saber.ula.ve/handle/123456789/22440 Notas de Matemática Tue, 07 Mar 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22440 2006-03-07T09:00:00Z http://www.saber.ula.ve/handle/123456789/22439 Extension of the range condition for the controllability of non-autonomous linear systems. Leiva A., Hugo Antonio Thu, 11 Aug 2005 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22439 2005-08-11T09:00:00Z