@article{CMH_1980__55_139831,
     author = {Peter Li},
     title = {Eigenvalue estimates on homogeneous manifolds.},
     journal = {Commentarii mathematici Helvetici},
     pages = {347--363},
     publisher = {mathdoc},
     volume = {55},
     year = {1980},
     zbl = {0451.53036},
     url = {http://geodesic.mathdoc.fr/item/CMH_1980__55_139831/}
}