@article{10_37236_3767,
     author = {Uwe Schauz},
     title = {Some new characterizations of graph colorability and of blocking sets of projective spaces},
     journal = {The electronic journal of combinatorics},
     year = {2014},
     volume = {21},
     number = {2},
     doi = {10.37236/3767},
     zbl = {1300.05110},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3767/}
}