@article{JAC_1999__10_1_a1,
     author = {Tardif, Claude},
     title = {Fractional multiples of graphs and the density of vertex-transitive graphs},
     journal = {Journal of Algebraic Combinatorics},
     pages = {61--68},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1999__10_1_a1/}
}