%0 Journal Article %A Ahmad, Bashir %A Ntouyas, Sotiris %T A study of second order differential inclusions with four-point integral boundary conditions %J Discussiones Mathematicae. Differential Inclusions, Control and Optimization %D 2011 %P 137-156 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMDICO_2011_31_2_a0/ %G en %F DMDICO_2011_31_2_a0