TY  - JOUR
AU  - Alexander Burstein
TI  - A short proof for the number of permutations containing pattern 321 exactly once
JO  - The electronic journal of combinatorics
PY  - 2011
VL  - 18
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.37236/2017/
DO  - 10.37236/2017
ID  - 10_37236_2017
ER  -