@article {198971,
	title = {A Test of Perfect Substitutability in the Foreign Exchange Market},
	journal = {Southern Economic Journal},
	volume = {48},
	year = {1982},
	url = {http://www.jstor.org/discover/10.2307/1058491?uid=3739696\&uid=2\&uid=4\&uid=3739256\&sid=21104673909843},
	author = {Jeffrey Frankel}
}
