TY - JOUR AU - Verriest, Erik I. TI - New qualitative methods for stability of delay systems JO - Kybernetika PY - 2001 SP - 229 EP - 238 VL - 37 IS - 3 UR - http://geodesic.mathdoc.fr/item/KYB_2001_37_3_a1/ LA - en ID - KYB_2001_37_3_a1 ER -