TY - JOUR AU - M. N. Feller TI - Boundary-Value Problems for a Nonlinear Hyperbolic Equation with Variable Coefficients and the Lévy Laplacian JO - Matematičeskie zametki PY - 2014 SP - 440 EP - 449 VL - 96 IS - 3 UR - http://geodesic.mathdoc.fr/item/MZM_2014_96_3_a12/ LA - ru ID - MZM_2014_96_3_a12 ER -