%0 Journal Article %A Verriest, Erik I. %T New qualitative methods for stability of delay systems %J Kybernetika %D 2001 %P [229] %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_2001__37_3_a1/ %G en %F KYB_2001__37_3_a1