[1]
Bogolyubov, A., Malykh, M. and Panin, A. 2009. Two-sided estimates for the eigenvalues of the Laplace operator with Dirichlet boundary conditions and their application to problems in the mathematical theory of waveguides. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie). 10, 19 (Feb. 2009), 83–93.