TY  - JOUR
AU  - Sorin V. Sabau
TI  - The Co-Points of Rays are Cut Points of Upper Level Sets for Busemann Functions
JO  - Symmetry, integrability and geometry: methods and applications
PY  - 2016
VL  - 12
UR  - http://geodesic.mathdoc.fr/item/SIGMA_2016_12_a35/
LA  - en
ID  - SIGMA_2016_12_a35
ER  -