%0 Journal Article %A M. N. Mishra %A S. K. Acharya %T Characterization of the Upper and the Lower Classes for Diffusion Processes in Terms of Convergence Rates %J Mathematica balkanica %D 1993 %P 285 %V 7 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_1993_7_3-4_a10/ %F MABA_1993_7_3-4_a10