TY  - JOUR
AU  - Guo, Li
TI  - Operated semigroups, Motzkin paths and rooted trees
JO  - Journal of Algebraic Combinatorics
PY  - 2009
SP  - 35
EP  - 62
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JAC_2009__29_1_a4/
LA  - en
ID  - JAC_2009__29_1_a4
ER  -