%0 Journal Article
%A Ufnarovski, Victor
%A Åhlander, Bo
%T How to differentiate a number
%J Journal of integer sequences
%D 2003
%V 6
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JIS_2003__6_3_a2/
%G en
%F JIS_2003__6_3_a2