@article{DE_1966_2_11_a14,
     author = {V. I. Kval'vasser and Yu. P. Samarin},
     title = {Quasi-periodic and periodic solutions of problems with moving boundaries for the wave equation in a one-dimensional space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1541--1543},
     publisher = {mathdoc},
     volume = {2},
     number = {11},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_11_a14/}
}