%0 Journal Article %A I. K. Lifanov %A S. L. Stavtsev %T Integral equations and sound propagation in a shallow sea %J Differencialʹnye uravneniâ %D 2004 %P 1256-1270 %V 40 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_9_a11/ %G ru %F DE_2004_40_9_a11