Bojmatov, K. Kh.; Kostyuchenko, A. G. Distribution of eigenvalues of an elliptic operator in a bounded region. (English. Russian original) Zbl 0711.35093 J. Sov. Math. 50, No. 1, 1337-1350 (1990); translation from Tr. Semin. Im. I. G. Petrovskogo 13, 3-18 (1988). MSC: 35P20 47F05 35J30 PDFBibTeX XMLCite \textit{K. Kh. Bojmatov} and \textit{A. G. Kostyuchenko}, J. Sov. Math. 50, No. 1, 1337--1350 (1990; Zbl 0711.35093); translation from Tr. Semin. Im. I. G. Petrovskogo 13, 3--18 (1988) Full Text: DOI
Kostyuchenko, A. G.; Orazov, M. B. Problem of oscillations of an elastic half cylinder and related self- adjoint quadratic pencils. (English) Zbl 0587.73081 J. Sov. Math. 33, 1025-1065 (1986). MSC: 74H45 35P05 35P10 PDFBibTeX XMLCite \textit{A. G. Kostyuchenko} and \textit{M. B. Orazov}, J. Sov. Math. 33, 1025--1065 (1986; Zbl 0587.73081) Full Text: DOI