@article{TMF_1990_83_1_a7,
     author = {A. V. Bratchikov},
     title = {Two-dimensional chiral models with infinite-dimensional symmetry algebras},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {64--71},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_83_1_a7/}
}