@article{INTO_2017_140_a1,
     author = {I. T. Habibullin and M. N. Poptsova},
     title = {Integrable two-dimensional lattices. {Characteristic} {Lie} rings and classification},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {18--29},
     publisher = {mathdoc},
     volume = {140},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2017_140_a1/}
}