@article{SMJ2_2001_27_2_a3,
     author = {Nenov, Nedyalko},
     title = {On the {3-Colouring} {Vertex} {Folkman} {Number} {F(2,2,4)}},
     journal = {Serdica Mathematical Journal},
     pages = {131--136},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2001_27_2_a3/}
}