TY - JOUR AU - V. P. Maslov TI - An asymptotic expression for the eigenfunctions of the equation $\Delta u+k^2u=0$ with boundary conditions on equidistant curves and the propagation of electromagnetic waves in a waveguide JO - Doklady Akademii Nauk PY - 1958 SP - 631 EP - 633 VL - 123 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a13/ LA - ru ID - DAN_1958_123_4_a13 ER -