TY  - JOUR
AU  - Ferry H. Kwakkel
TI  - Focal rigidity of hyperbolic surfaces
JO  - Annales Fennici Mathematici
PY  - 2012
SP  - 149
EP  - 159
VL  - 37
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2012.3724/
DO  - 10.5186/aasfm.2012.3724
LA  - en
ID  - AFM_2012_37_1_a10
ER  -