@article{DAN_1991_321_5_a11,
     author = {\`E. Kh. Azimov and T. M. Ibragimov and S. S. Salmanova and M. T. Abasov},
     title = {Analytical investigation of isolated},
     journal = {Doklady Akademii Nauk},
     pages = {925--928},
     year = {1991},
     volume = {321},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_5_a11/}
}