@article {fmy-mctc-10,
   author = {Fekete, Sándor and Mitchell, Joseph and Schmidt, Christiane},
   affiliation = {Braunschweig Institute of Technology Algorithms Group Braunschweig Germany},
   title = {Minimum covering with travel cost},
   journal = {Journal of Combinatorial Optimization},
   publisher = {Springer Netherlands},
   issn = {1382-6905},
   keyword = {Mathematics and Statistics},
   pages = {393-402},
   year = {2010}
}