On the Sobolev constant and the p-spectrum of a compact riemannian manifold
Annales scientifiques de l'École Normale Supérieure, Serie 4, Volume 13 (1980) no. 4, p. 451-468 
@article{ASENS_1980_4_13_4_451_0,
     author = {Li, Peter},
     title = {On the Sobolev constant and the $p$-spectrum of a compact riemannian manifold},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     publisher = {Elsevier},
     volume = {Ser. 4, 13},
     number = {4},
     year = {1980},
     pages = {451-468},
     doi = {10.24033/asens.1392},
     zbl = {0466.53023},
     mrnumber = {82h:58054},
     language = {en},
     url = {http://www.numdam.org/item/ASENS_1980_4_13_4_451_0}
}

Li, Peter. On the Sobolev constant and the $p$-spectrum of a compact riemannian manifold. Annales scientifiques de l'École Normale Supérieure, Serie 4, Volume 13 (1980) no. 4, pp. 451-468. doi : 10.24033/asens.1392. http://www.numdam.org/item/ASENS_1980_4_13_4_451_0/

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