TY  - JOUR
AU  - Pavel Růžička
TI  - Free trees and the optimal bound in Wehrung's theorem
JO  - Fundamenta Mathematicae
PY  - 2008
SP  - 217
EP  - 228
VL  - 198
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm198-3-2/
DO  - 10.4064/fm198-3-2
LA  - de
ID  - 10_4064_fm198_3_2
ER  -