@article {2001,
	title = {Stationary states for a two-dimensional singular Schrodinger equation},
	journal = {Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8) 4 (2001), no. 3, 609-633.},
	number = {SISSA;35/99/M},
	year = {2001},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/1249},
	author = {Paolo Caldiroli and Roberta Musina}
}
