@article{HennigNygreenLuebbecke2019a,
	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},
	journal = {Naval Research Logistics},
	year = {2012},
	number = {3--4},
	pages = {298--310},
	volume = {59},
	month = {Apr},
	doi = {10.1002/nav.21489}
}