@TECHREPORT{BA,
	author = "F. Barahona and R. Anbil",
 	title = "The Volume algorithm: producing primal solutions
with a subgradient method",
	institution = "IBM, T. J. Watson Research Center",
      year = 1998,
   type = "Research Report",
   number = "RC 21103",
}
@TECHREPORT{BC,
	author = "F. Barahona and F. Chudak",
 	title = "Solving large scale uncapacitated facility
location problems",
	institution = "IBM, T. J. Watson Research Center",
      year = 1999,
   type = "Research Report",
   number = "RC 21515",
}