@article {2001,
	title = {Multiplicity results for some nonlinear Schrodinger equations with potentials},
	journal = {Arch. Ration. Mech. An., 2001, 159, 253},
	number = {SISSA;108/00/AF},
	year = {2001},
	publisher = {SISSA Library},
	doi = {10.1007/s002050100152},
	url = {http://hdl.handle.net/1963/1564},
	author = {Antonio Ambrosetti and Andrea Malchiodi and Simone Secchi}
}
