@article{IVM_1994_2_a2,
     author = {A. V. Balandin},
     title = {On a~zero curvature representation of a~system of differential equations that is reducible to a~nonlinear {Klein--Gordon} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {15--16},
     publisher = {mathdoc},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1994_2_a2/}
}