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  1. Martinez Méndez, F.J.: Aproximacion general a la evaluacion de la recuperacion mediante motores de busqueda en Internet (2001) 0.02 
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  2. Olvera Lobo, M.D.: Rendimiento de los sistemas de recuperacion de informacion en al World Wide Web : revision metodologica (2000) 0.01 
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  3. Pulido, J.R.V.: Recupracion de la information en Internet : motores y otros agentes des busqueda (1997) 0.01 
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