@article{ELMA_1975__30_141151,
     author = {John Roberts},
     title = {Vertex {Cyclic} {Graphs.}},
     journal = {Elemente der Mathematik},
     pages = {5--10},
     publisher = {mathdoc},
     volume = {30},
     year = {1975},
     zbl = {0307.05125},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1975__30_141151/}
}