@article{CMH_1975__50_139612,
     author = {Su-Shing Chen},
     title = {Complete {Homogeneous} {Riemannian} {Manifolds} of {Negative} {Sectional} {Curvature.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {115--122},
     publisher = {mathdoc},
     volume = {50},
     year = {1975},
     zbl = {0301.53029},
     url = {http://geodesic.mathdoc.fr/item/CMH_1975__50_139612/}
}