@article{CMJ_2006__56_3_a6,
     author = {Nebesk\'y, Ladislav},
     title = {Signpost systems and spanning trees of graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {885--893},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {2006},
     mrnumber = {2261660},
     zbl = {1164.05392},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/CMJ_2006__56_3_a6/}
}