TY  - JOUR
AU  - Ian Le
TI  - Wilf classes of pairs of permutations of length 4
JO  - The electronic journal of combinatorics
PY  - 2005
VL  - 12
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1922/
DO  - 10.37236/1922
ID  - 10_37236_1922
ER  -