@inproceedings{andrea2011on,
title={ON THE DISCRETENESS OF THE SPECTRUM OF THE LAPLACIAN ON NONCOMPACT RIEMANNIAN MANIFOLDS},
author={Andrea Cianchi, and Vladimir Maz’ya},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160912071511843730872},
booktitle={Journal of Differential Geometry},
volume={87},
number={3},
pages={469-491},
year={2011},
}
Andrea Cianchi, and Vladimir Maz’ya. ON THE DISCRETENESS OF THE SPECTRUM OF THE LAPLACIAN ON NONCOMPACT RIEMANNIAN MANIFOLDS. 2011. Vol. 87. In Journal of Differential Geometry. pp.469-491. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160912071511843730872.