@article{TMF_2002_132_1_a3,
     author = {A. N. Leznov},
     title = {Discrete {Symmetries} of the $n${-Wave} {Problem}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {74--89},
     publisher = {mathdoc},
     volume = {132},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2002_132_1_a3/}
}