%0 Journal Article %A Fečkan, Michal %T Periodic solutions in systems at resonances with small relay hysteresis %J Mathematica slovaca %D 1999 %P 41-52 %V 49 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1999__49_1_a5/ %G en %F MASLO_1999__49_1_a5