%0 Journal Article %A Doležal, Václav %T On general feedback systems containing delayers %J Applications of Mathematics %D 1968 %P 489-507 %V 13 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1968.103198/ %R 10.21136/AM.1968.103198 %G en %F 10_21136_AM_1968_103198