@article{TMF_2013_177_3_a2,
     author = {I. T. Habibullin and M. V. Yangubaeva},
     title = {Formal diagonalization of a~discrete {Lax} operator and conservation laws and symmetries of dynamical systems},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {441--467},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2013_177_3_a2/}
}