TY  - JOUR
AU  - Xie, BaoHua
AU  - Wang, JieYan
AU  - Jiang, YuePing
TI  - Free Groups Generated by Two Heisenberg Translations
JO  - Canadian mathematical bulletin
PY  - 2013
SP  - 881
EP  - 889
VL  - 56
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2012-042-0/
DO  - 10.4153/CMB-2012-042-0
ID  - 10_4153_CMB_2012_042_0
ER  -