TY  - JOUR
AU  - Novelli, Carla
AU  - Occhetta, Gianluca
TI  - Manifolds Covered by Lines and Extremal Rays
JO  - Canadian mathematical bulletin
PY  - 2012
SP  - 799
EP  - 814
VL  - 55
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2011-119-7/
DO  - 10.4153/CMB-2011-119-7
ID  - 10_4153_CMB_2011_119_7
ER  -