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3. Refinement Methods of Newton Type for Approximate Eigenelements of Integral Operators;Ahués;Siam J. Numer. Anal.,1985
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5. Alvizú, J. (1985). Métodos de Correcciön de Residuo a Dos Mallas para el Cálculo de Valores Propios Mültiples: Caso de un Operador Integral Compacto. Engineering Thesis Univ. of Chile. Memoria de Ingeniero Matemático, Univ. de Chile.