%0 Journal Article %A G. Anastassiou %T On H-Fuzzy Differentiation %J Mathematica balkanica %D 2002 %P 153 %V 16 %N 1-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2002_16_1-4_a9/ %F MABA_2002_16_1-4_a9