%0 Journal Article %1 appel1977 %A Appel, K. %A Haken, W. %A Koch, J. %D 1977 %I University of Illinois at Urbana-Champaign, Department of Mathematics %J Illinois J. Math. %K four.color.theorem graph.theory %N 3 %P 491--567 %T Every planar map is four colorable. Part II: Reducibility %U http://projecteuclid.org/euclid.ijm/1256049012 %V 21

@article{appel1977, added-at = {2015-05-19T09:34:53.000+0200}, author = {Appel, K. and Haken, W. and Koch, J.}, biburl = {https://www.bibsonomy.org/bibtex/26067f820199419216d2f78e68598287a/ytyoun}, fjournal = {Illinois Journal of Mathematics}, interhash = {53a6348c96e687f1da80c02e5229961f}, intrahash = {6067f820199419216d2f78e68598287a}, journal = {Illinois J. Math.}, keywords = {four.color.theorem graph.theory}, month = {09}, number = 3, pages = {491--567}, publisher = {University of Illinois at Urbana-Champaign, Department of Mathematics}, timestamp = {2015-05-19T09:35:54.000+0200}, title = {Every planar map is four colorable. Part II: Reducibility}, url = {http://projecteuclid.org/euclid.ijm/1256049012}, volume = 21, year = 1977 }