%0 Journal Article %A Zeheb, Ezra %T Robust stability of non linear time varying systems %J Kybernetika %D 1999 %P 415-428 %V 35 %N 4 %U http://geodesic.mathdoc.fr/item/KYB_1999_35_4_a1/ %G en %F KYB_1999_35_4_a1