%0 Journal Article %A Manuel Valdivia %T A Class of Quasi-Barrelled (DF)-Spaces which are not Bornological. %J Mathematische Zeitschrift %D 1974 %P 249-252 %V 136 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1974__136_172039/ %F MZ_1974__136_172039