@article{10_4064_cm_3_1_19_30,
     author = {P. Tur\'an},
     title = {On the theory of graphs},
     journal = {Colloquium Mathematicum},
     pages = {19--30},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1954},
     doi = {10.4064/cm-3-1-19-30},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-3-1-19-30/}
}