@article{DMDICO_2011_31_2_a0,
     author = {Ahmad, Bashir and Ntouyas, Sotiris},
     title = {A study of second order differential inclusions with four-point integral boundary conditions},
     journal = {Discussiones Mathematicae. Differential Inclusions, Control and Optimization},
     pages = {137--156},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2011},
     zbl = {1262.34020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMDICO_2011_31_2_a0/}
}