%0 Journal Article %A Sano, Hideki %T On approximation of stability radius for an infinite-dimensional feedback control system %J Kybernetika %D 2016 %P 824-835 %V 52 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14736/kyb-2016-5-0824/ %R 10.14736/kyb-2016-5-0824 %G en %F 10_14736_kyb_2016_5_0824