%0 Journal Article %A Spraker, John S. %A Biles, Daniel C. %T Filippov's operation and some attributes %J Czechoslovak Mathematical Journal %D 1994 %P 513-520 %V 44 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128474/ %R 10.21136/CMJ.1994.128474 %G en %F 10_21136_CMJ_1994_128474