TY  - JOUR
AU  - Knuth, Donald E.
TI  - Another Enumeration of Trees
JO  - Canadian journal of mathematics
PY  - 1968
SP  - 1077
EP  - 1086
VL  - 20
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-104-8/
DO  - 10.4153/CJM-1968-104-8
ID  - 10_4153_CJM_1968_104_8
ER  -