%0 Journal Article %A È. P. Gulin %T On the coherence of an acoustic field in the reflection of sound from %J Doklady Akademii Nauk %D 1973 %P 1082-1085 %V 212 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_212_5_a14/ %G ru %F DAN_1973_212_5_a14