%0 Journal Article %A Sgall, Jiří %T Construction of the class FN %J Commentationes Mathematicae Universitatis Carolinae %D 1986 %P 435-436 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1986__27_3_a1/ %G en %F CMUC_1986__27_3_a1