%0 Journal Article
%A V. V. Ganina
%T On stability of pendulm's upper equilibrium position
%J Matematičeskoe modelirovanie
%D 1998
%P 110-114
%V 10
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM_1998_10_2_a9/
%G ru
%F MM_1998_10_2_a9