@techreport{repORt:2015-028,
	author = {C. B\"{u}sing and S. Kirchner and A.M.C.A. Koster and A. Thome},
	title = {The Budgeted Minimum Cost Flow Problem with Unit Upgrading Cost},
	institution = {Lehrstuhl f\"{u}r Operations Research, RWTH Aachen University},
	year = {2015},
	type = {repORt},
	number = {2015--028},
	month = {Oct}
}