%0 Journal Article %A J.B. Wilker %A M. Paluszny %T A case of the 3-dimensional problem of Appollonius. %J Aequationes mathematicae %D 1991 %P 172-186 %V 41 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1991__41_2-3_137405/ %F AM2_1991__41_2-3_137405