%0 Journal Article %A M. A. Nudelman %T Passive scattering systems with nonlinear feedback %J Differencialʹnye uravneniâ %D 1999 %P 1492-1495 %V 35 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1999_35_11_a7/ %G ru %F DE_1999_35_11_a7