@article{JEMS_2006_8_2_a3,
     author = {David Arcoya and Jos\'e Carmona},
     title = {On two problems studied by {A.} {Ambrosetti}},
     journal = {Journal of the European Mathematical Society},
     pages = {181--188},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2006},
     doi = {10.4171/jems/45},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/45/}
}