@article{ajma2015332,
author={MASHOOD, BAHMAN},
title={On Geometrical Methods that Provide a Short Proof of Four Color Theorem},
journal={American Journal of Mathematical Analysis},
volume={3},
number={3},
pages={65--71},
year={2015},
url={http://pubs.sciepub.com/ajma/3/3/2},
issn={2333-8431},
abstract={In this article we introduce a short and comprehensive proof of four color theorem based on geometrical methods. At the end of the article we will provide a short proof of the De Bruijn Erdos theorem for locally finite infinite graphs.},
doi={10.12691/ajma-3-3-2}
publisher={Science and Education Publishing}
}