@inbook{NBERc10539,
 Crossref = "NBERaesm77-5",
 title = "Restrictions on the Control Vector in Economic Optimization Problems",
 author = "Roger Craine",
 BookTitle = "Annals of Economic and Social Measurement, Volume 6, number 5",
 Publisher = "",
 pages = "19-25",
 year = "1977",
 month = "December",
 URL = "http://www.nber.org/chapters/c10539",
}
@book{NBERaesm77-5,
 title = "Annals of Economic and Social Measurement, Volume 6, number 5",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "",
 year = "1977",
 URL = "http://www.nber.org/books/aesm77-5",
}