Referencias

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J. Ortega Campos y H. V. McIntosh, ``Estudio de Vibraciones de Redes Lineales con Interacciones a Segundos Vecinos,'' Intituto Mexicano del Petróleo, Pub. 71 EI/077 (1971).

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E. W. Montroll y R. B. Potts, Phys. Rev. 100, 525 (1955).

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R. F. Wallis y A. A. Maraudin, Prog. Theor. Phys. 24, 1055 (1960).

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S. Takeno, S. Kashiwamura y E. Teramoto, Prog. Theor. Phys. Suppl. 23, 124 (1962).

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E. T. Kintzer, J. Math. Phys. 11, 203 (1970).

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J. Hori, ``Spectral Properties of Discordered Chains and Lattices,'' Pergamon Press, London (1968).

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P. A. M. Dirac, ``The Principles of Quantum Mechanics,'' Clarendon Press, Oxford (1958).

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P. R. Halmos, ``Finite Dimensional Vector Spaces,'' D. Van Nostrand Co. 2nd. Edition (1960).

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21

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