@article{10_4153_CMB_2006_016_2,
     author = {Yun, Jong-Gug},
     title = {Comparison {Geometry} {With} {L} {1-Norms} of {Ricci} {Curvature}},
     journal = {Canadian mathematical bulletin},
     pages = {152--160},
     year = {2006},
     volume = {49},
     number = {1},
     doi = {10.4153/CMB-2006-016-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2006-016-2/}
}