%0 Journal Article %A A. V. Stepanov %T On the coefficient of absorption of ultracold neutrons in a~medium bounded by a~rough surface %J Teoretičeskaâ i matematičeskaâ fizika %D 1975 %P 425-430 %V 22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1975_22_3_a15/ %G ru %F TMF_1975_22_3_a15