@article {Unger:1999:0363-6550:75,
	author = "Unger P.",
	title = "The Mystery of the Physical and the Matter of Qualities: A Paper for Professor Shaffer",
	journal = "Midwest Studies In Philosophy",
	volume = "23",
	year = "1999",
	abstract = "",
	pages = "75-99(25)",
	url = "http://www.ingentaconnect.com/content/bpl/misp/1999/00000023/00000001/art00005"
	doi = "doi:10.1111/1475-4975.00005"
}