@techreport{repORt:2012-004,
	author = {F. Hennig and B. Nygreen and M. L\"{u}bbecke},
	title = {Nested column generation applied to the crude oil tanker routing and scheduling problem with split pickup and split delivery},
	institution = {Operations Research, RWTH Aachen University},
	year = {2012},
	number = {2012--004},
	month = {Mar}
}