@article{bwmeta1.element.bwnjournal-article-cmv13i2n13,
author = {P. Erd\"os},
title = {On an extremal problem in graph theory},
journal = {Colloquium Mathematicae},
volume = {13},
year = {1964},
pages = {251-254},
zbl = {0137.18101},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-cmv13i2n13}
}
P. Erdös. On an extremal problem in graph theory. Colloquium Mathematicae, Tome 13 (1964) pp. 251-254. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-cmv13i2n13/