@article{AIHPC_2001__18_2_135_0, author = {Sirakov, Boyan}, title = {Symmetry for exterior elliptic problems and two conjectures in potential theory}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {135--156}, publisher = {Elsevier}, volume = {18}, number = {2}, year = {2001}, mrnumber = {1808026}, zbl = {0997.35014}, language = {en}, url = {http://archive.numdam.org/item/AIHPC_2001__18_2_135_0/} }