Two-sided approximations for the eigenvalues and eigenvectors of nonlinear operators
English version (Springer): Ukrainian Mathematical Journal 26 (1974), no. 1, pp 107-114.
Citation Example: Shportyuk G. A. Two-sided approximations for the eigenvalues and eigenvectors of nonlinear operators // Ukr. Mat. Zh. - 1974. - 26, № 1. - pp. 126–135.
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