@article{10_2307_2661394,
     author = {Peter Li and Jiaping Wang},
     title = {Counting dimensions of {\(L\)-harmonic} functions},
     journal = {Annals of mathematics},
     year = {2000},
     volume = {152},
     number = {2},
     doi = {10.2307/2661394},
     zbl = {0996.35020},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/2661394/}
}