@inbook{NBERc0363,
 Crossref = "NBERfran07-1",
 title = "Comment on "Trade Invoicing in the Accession Countries: Are They Suited to the Euro?"",
 author = "Richard Portes",
 BookTitle = "NBER International Seminar on Macroeconomics 2005",
 Publisher = "MIT Press",
 pages = "399-402",
 year = "2005",
 month = "June",
 URL = "http://www.nber.org/chapters/c0363",
}
@book{NBERfran07-1,
 title = "NBER International Seminar on Macroeconomics 2005",
 author = "Jeffrey A. Frankel and Christopher Pissarides",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "2007",
 URL = "http://www.nber.org/books/fran07-1",
}