@article{TMF_2018_197_3_a0,
     author = {D. V. Bykov},
     title = {The~$1/N$-expansion for flag-manifold $\sigma$-models},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {345--355},
     publisher = {mathdoc},
     volume = {197},
     number = {3},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2018_197_3_a0/}
}