@article{10_4153_CMB_1992_030_0,
     author = {Hui, Kin Ming},
     title = {Comparison {Theorems} for the {Eigenvalues} of the {Laplacian} in the {Unit} {Ball} in {RN}},
     journal = {Canadian mathematical bulletin},
     pages = {214--217},
     year = {1992},
     volume = {35},
     number = {2},
     doi = {10.4153/CMB-1992-030-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-030-0/}
}