@article{schauer-16,
 author = {Christian Schauer and Günther R. Raidl},
 doi = {http://dx.doi.org/10.1016/j.endm.2016.03.025},
 journal = {Electronic Notes in Discrete Mathematics},
 note = {INOC 2015 -- 7th International Network Optimization Conference},
 pages = {189--196},
 title = {A Multi-Commodity Flow Based Model for Multi Layer Hierarchical Ring Network Design},
 url = {https://www.ac.tuwien.ac.at/files/pub/schauer-16.pdf},
 volume = {52},
 year = {2016}
}