%0 Journal Article %A V. F. Apel'tsin %T Letter to the editors: ``Analytic continuations of solutions of boundary value problems for the stationary wave equation'' [Differentsial'nye Uravneniya \textbf{27} (1991), no. 1, 8--17, 179; MR1133505] %J Differencialʹnye uravneniâ %D 1992 %P 1836 %V 28 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_10_a21/ %G ru %F DE_1992_28_10_a21