%0 Journal Article
%A Alexander Burstein
%T A short proof for the number of permutations containing pattern 321 exactly once
%J The electronic journal of combinatorics
%D 2011
%V 18
%N 2
%U http://geodesic.mathdoc.fr/articles/10.37236/2017/
%R 10.37236/2017
%F 10_37236_2017