%0 Journal Article %A S. Bulman-Fleming %A K. McDowell %T Flatness in varieties of normal bands. %J Semigroup forum %D 1980 %P 139-150 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1980__19_134379/ %F SF_1980__19_134379