@article{02153150,
title = {Haj\'os' theorem and the partition lemma.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {46},
year = {2005},
pages = {119-123},
zbl = {1069.20047},
language = {en},
url = {http://dml.mathdoc.fr/item/02153150}
}
Szabó, Sándor. Hajós' theorem and the partition lemma.. Beiträge zur Algebra und Geometrie, Tome 46 (2005) pp. 119-123. http://gdmltest.u-ga.fr/item/02153150/