%0 Journal Article
%A Łazarow, Ewa
%T The oscillatory behaviour of Ι-approximate derivatives
%J Acta Universitatis Lodziensis. Folia Mathematica
%D 1992
%V 05
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AULFM_1992_05_a4/
%G en
%F AULFM_1992_05_a4