@article{CRMATH_2007__345_11_643_0, author = {Yann Ollivier}, title = {Ricci curvature of metric spaces}, journal = {Comptes Rendus. Math\'ematique}, pages = {643--646}, publisher = {Elsevier}, volume = {345}, number = {11}, year = {2007}, doi = {10.1016/j.crma.2007.10.041}, language = {en}, }