TY - JOUR AU - V. F. Apel'tsin TI - Letter to the editors: “Analytic continuations of solutions of boundary value problems for the stationary wave equation” [Differentsial'nye Uravneniya 27 (1991), no. 1, 8–17, 179; MR1133505] JO - Differencialʹnye uravneniâ PY - 1992 SP - 1836 VL - 28 IS - 10 UR - http://geodesic.mathdoc.fr/item/DE_1992_28_10_a21/ LA - ru ID - DE_1992_28_10_a21 ER -