N. Frohner, S. Teuschl, G. Raidl:
"Casual Employee Scheduling with Constraint Programming and Ant Colony Optimization";
in: "Eurocast2019-EXTENDED ABSTRACTS", Universidad de Las Palmas de Gran Canaria, 2019, ISBN: 978-84-09-09208-6, 78 - 79.
https://publik.tuwien.ac.at/files/publik_293657.pdf