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Martinez Méndez, F.J.: Aproximacion general a la evaluacion de la recuperacion mediante motores de busqueda en Internet (2001)
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Olvera Lobo, M.D.: Rendimiento de los sistemas de recuperacion de informacion en al World Wide Web : revision metodologica (2000)
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Pulido, J.R.V.: Recupracion de la information en Internet : motores y otros agentes des busqueda (1997)
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