%0 Journal Article %A Liz, E. %A Nieto, Juan J. %T The monotone iterative technique for periodic boundary value problems of second order impulsive differential equations %J Commentationes Mathematicae Universitatis Carolinae %D 1993 %P 405-411 %V 34 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1993__34_3_a1/ %G en %F CMUC_1993__34_3_a1