%0 Journal Article %A V. A. Klyachin %A V. M. Miklyukov %T Criteria of instability of surfaces of zero mean curvature in warped Lorentz products %J Sbornik. Mathematics %D 1996 %P 1643-1663 %V 187 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1996_187_11_a2/ %G en %F SM_1996_187_11_a2