@article{DAN_1991_317_3_a26,
     author = {T. I. Zelenova and V. V. Migulin and M. N. Fatkullin and A. D. Legen'ka and Ts. Pashova and O. I. Maksimenko},
     title = {Instability of the $\mathrm{F2}$-area of the ionosphere before the {Vranchesk} earthquake on 31 {August} 1986},
     journal = {Doklady Akademii Nauk},
     pages = {620--625},
     publisher = {mathdoc},
     volume = {317},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_3_a26/}
}