TY  - JOUR
AU  - Adachi, Toshiaki
TI  - Spherical Mean and the Fundamental Group
JO  - Canadian mathematical bulletin
PY  - 1991
SP  - 3
EP  - 11
VL  - 34
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-001-2/
DO  - 10.4153/CMB-1991-001-2
ID  - 10_4153_CMB_1991_001_2
ER  -