%0 Journal Article
%A V. G. Romanovsky
%T On the calculation of Lyapunov quantities in the case of two purely imaginary roots
%J Differencialʹnye uravneniâ
%D 1993
%P 910-912
%V 29
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1993_29_5_a23/
%G ru
%F DE_1993_29_5_a23