TY  - JOUR
AU  - Janusz Grabowski
TI  - Free subgroups of diffeomorphism groups
JO  - Fundamenta Mathematicae
PY  - 1988
SP  - 103
EP  - 121
VL  - 131
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-131-2-103-121/
DO  - 10.4064/fm-131-2-103-121
LA  - en
ID  - 10_4064_fm_131_2_103_121
ER  -