@article{10_4064_aa_9_4_331_340,
     author = {R. Rado},
     title = {Universal graphs and universal functions},
     journal = {Acta Arithmetica},
     pages = {331--340},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1964},
     doi = {10.4064/aa-9-4-331-340},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-9-4-331-340/}
}