@article{INTM_1984_22_a3,
     author = {A. N. Leznov and M. V. Saveliev},
     title = {Nonlinear equations and graded {Lie} algebras},
     journal = {Itogi nauki i tehniki. Seri\^a, Matemati\v{c}eskij analiz},
     pages = {101--136},
     publisher = {mathdoc},
     volume = {22},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTM_1984_22_a3/}
}