@article{DAN_1970_195_6_a11,
     author = {V. M. Astapenko},
     title = {Reflection of sound by a corrugated impedance surface},
     journal = {Doklady Akademii Nauk},
     pages = {1296--1299},
     publisher = {mathdoc},
     volume = {195},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_6_a11/}
}