%0 Journal Article
%A T. I. Zelenova
%A V. V. Migulin
%A M. N. Fatkullin
%A A. D. Legen'ka
%A Ts. Pashova
%A O. I. Maksimenko
%T Instability of the $\mathrm{F2}$-area of the ionosphere before the Vranchesk earthquake on 31 August 1986
%J Doklady Akademii Nauk
%D 1991
%P 620-625
%V 317
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_317_3_a26/
%G ru
%F DAN_1991_317_3_a26