@article{TMF_2016_189_3_a5,
     author = {D. V. Bykov},
     title = {Cyclic gradings of {Lie} algebras and {Lax} pairs for $\sigma$-models},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {380--388},
     publisher = {mathdoc},
     volume = {189},
     number = {3},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2016_189_3_a5/}
}