%0 Journal Article
%A Aimin Xu
%T Extensions of Spivey's Bell number formula
%J The electronic journal of combinatorics
%D 2012
%V 19
%N 2
%U http://geodesic.mathdoc.fr/articles/10.37236/2146/
%R 10.37236/2146
%F 10_37236_2146