@article{TMF_1985_62_1_a11,
     author = {G. G. Ivanov},
     title = {Polynomial conservation laws and exact solutions associated with isometric and homothetic symmetries in the nonlinear sigma model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {144--152},
     publisher = {mathdoc},
     volume = {62},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_62_1_a11/}
}