@article{GDZPPN002230097,
title = {Multiplicity of positive solutions of nonlinear elliptic equations with critical sobolev exponent in some contractible domains.},
journal = {Manuscripta mathematica},
volume = {64},
year = {1989},
pages = {147-166},
zbl = {0701.35068},
url = {http://dml.mathdoc.fr/item/GDZPPN002230097}
}
Passaseo, Donato. Multiplicity of positive solutions of nonlinear elliptic equations with critical sobolev exponent in some contractible domains.. Manuscripta mathematica, Tome 64 (1989) pp. 147-166. http://gdmltest.u-ga.fr/item/GDZPPN002230097/