@article{DAN_1969_188_2_a18,
     author = {Yu. Yu. Zhitkovskii},
     title = {Properties of sound signals reflected from the ocean surface},
     journal = {Doklady Akademii Nauk},
     pages = {334--337},
     year = {1969},
     volume = {188},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_2_a18/}
}