TY  - JOUR
AU  - Dongsheng, Zhao
TI  - On projective Z-frames
JO  - Canadian mathematical bulletin
PY  - 1997
SP  - 39
EP  - 46
VL  - 40
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1997-004-4/
DO  - 10.4153/CMB-1997-004-4
ID  - 10_4153_CMB_1997_004_4
ER  -