@inproceedings{cccg-06
, title =       "Spanning trees across axis-parallel segments"
, author =      "Csaba T\'{o}th and Michael Hoffmann"
, booktitle =   "Proceedings of the 18th Canadian Conference on Computational Geometry (CCCG'06)"
, site =        "Kingston"
, year =        2006
, pages =       "101--104"
}