@article{DE_1978_14_6_a9,
     author = {A. V. Bitsadze},
     title = {Waves in the flow of a fluid of variable density},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1053--1059},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_6_a9/}
}