@article{CMUC_2000__41_4_a5,
     author = {Bader, Ralf},
     title = {On the semilinear multi-valued flow under constraints and the periodic problem},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {719--734},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {2000},
     mrnumber = {1800171},
     zbl = {1057.34064},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2000__41_4_a5/}
}