@inproceedings{ruthmair-11a,
 author = {Mario Ruthmair and Günther R. Raidl},
 booktitle = {{Fifteenth Conference on Integer Programming and Combinatorial Optimization (IPCO XV)}},
 editor = {O. G{ü}nl{ü}k and G.J. Woeginger},
 keywords = {netdesign},
 pages = {376--388},
 publisher = {Springer, Heidelberg},
 series = {{LNCS}},
 title = {A Layered Graph Model and an Adaptive Layers Framework to Solve Delay-Constrained Minimum Tree Problems},
 url = {https://www.ac.tuwien.ac.at/files/pub/ruthmair-11a.pdf},
 volume = {6655},
 year = {2011}
}