@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/} }