TY  - JOUR
AU  - Pigola, S.
AU  - Rimoldi, M.
TI  - Characterizations of Model Manifolds by Means of Certain Differential Systems
JO  - Canadian mathematical bulletin
PY  - 2012
SP  - 632
EP  - 645
VL  - 55
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2011-134-0/
DO  - 10.4153/CMB-2011-134-0
ID  - 10_4153_CMB_2011_134_0
ER  -