@article{CMUC_2001__42_2_a4,
     author = {Cicho\'n, Mieczys{\l}aw and Kubiaczyk, Ireneusz},
     title = {Kneser-type theorem for the {Darboux} problem in {Banach} spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {267--279},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {2001},
     mrnumber = {1832146},
     zbl = {1115.35141},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2001__42_2_a4/}
}