@article{DAN_1966_170_2_a0,
     author = {V. M. Volosov and B. I. Morgunov},
     title = {Certain conditions for stability connected with the study of resonances},
     journal = {Doklady Akademii Nauk},
     pages = {239--241},
     publisher = {mathdoc},
     volume = {170},
     number = {2},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_2_a0/}
}