@article{ARM_1998__34_2_a4,
     author = {Halidias, Nikolaos and Papageorgiou, Nikolaos S.},
     title = {Second order multivalued boundary value problems},
     journal = {Archivum mathematicum},
     pages = {267--284},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1998},
     mrnumber = {1645320},
     zbl = {0915.34021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1998__34_2_a4/}
}