@article{DE_1984_20_9_a23,
     author = {S. V. Zhestkov},
     title = {Construction of multiperiodic solutions of semilinear hyperbolic systems of partial differential equations by means of characteristics},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1630--1632},
     publisher = {mathdoc},
     volume = {20},
     number = {9},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_9_a23/}
}