@article {2005,
	title = {Nonlinear Schr{\"o}dinger Equations with vanishing and decaying potentials},
	number = {SISSA;52/2005/M},
	year = {2005},
	url = {http://hdl.handle.net/1963/1760},
	author = {Antonio Ambrosetti and Wang Zhi-Qiang}
}
