@article{TMF_1985_63_3_a4,
     author = {L. O. Chekhov},
     title = {Nonlinear $\sigma$ model in the case of $N\times\alpha N$ rectangular matrices in two-dimensional {Euclidean} space},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {367--376},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_63_3_a4/}
}