@techreport{hu-06,
 address = {Vienna, Austria},
 author = {Bin Hu and Markus Leitner and Günther R. Raidl},
 institution = {Institute of Computer Graphics and Algorithms, Vienna University of Technology},
 keywords = {hybrid, mip, netdesign, vns},
 number = {TR 186--1--06--01},
 title = {Combining Variable Neighborhood Search with Integer Linear Programming for the Generalized Minimum Spanning Tree Problem},
 url = {https://www.ac.tuwien.ac.at/files/pub/hu-06.pdf},
 year = {2006}
}