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M. Caubergh.
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PhD thesis, Hasselt University, 2004.
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M. Corbera, J. Llibre, E. Pérez-Chavela.
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M. Corbera, J. Llibre, E. Pérez-Chavela.
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J. M. Cors, J. Llibre.
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J. M. Cors, J. Llibre, M. Ollé.
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J. Delgado, E. A. Lacomba, J. Llibre.
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Kluwer Academic/Plenum Publishers, New York, 2004.
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P. Dominguez, N. Fagella.
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N. Fagella, T. Martinez-Seara, J. Villanueva.
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