@article{IM2_1988_31_1_a3,
     author = {G. Sh. Guseinov},
     title = {On~the spectral theory of multiparameter difference equations of second order},
     journal = {Izvestiya. Mathematics},
     pages = {95--120},
     year = {1988},
     volume = {31},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1988_31_1_a3/}
}