@article{DAN_1983_271_4_a4,
     author = {A. S. Il'inskii and M. M. Mutallimov},
     title = {An investigation of the dispersion equations in the spectral method},
     journal = {Doklady Akademii Nauk},
     pages = {793--795},
     publisher = {mathdoc},
     volume = {271},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_271_4_a4/}
}