TY  - JOUR
AU  - Kennard, Lee
TI  - On the Hopf conjecture with symmetry
JO  - Geometry & topology
PY  - 2013
SP  - 563
EP  - 593
VL  - 17
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.2140/gt.2013.17.563/
DO  - 10.2140/gt.2013.17.563
ID  - GT_2013_17_1_a14
ER  -