@article{ARM_1998__34_4_a1,
     author = {Avgerinos, Evgenios P. and Papageorgiou, Nikolaos S.},
     title = {Extremal solutions and relaxation for second order vector differential inclusions},
     journal = {Archivum mathematicum},
     pages = {427--434},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1998},
     mrnumber = {1679637},
     zbl = {0973.34010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1998__34_4_a1/}
}