Four color theorem (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Four color theorem" in Simple English language version.

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Hud Hudson (May 2003). "Four Colors Do Not Suffice". The American Mathematical Monthly. 110 (5): 417–423. doi:10.2307/3647828. JSTOR 3647828.

doi.org

Hud Hudson (May 2003). "Four Colors Do Not Suffice". The American Mathematical Monthly. 110 (5): 417–423. doi:10.2307/3647828. JSTOR 3647828.
Pieter Maritz and Sonja Mouton (2012). "Francis Guthrie: A Colourful Life". The Mathematical Intelligencer. 34 (3): 67–75. doi:10.1007/s00283-012-9307-y. S2CID 121812208.

jstor.org

Hud Hudson (May 2003). "Four Colors Do Not Suffice". The American Mathematical Monthly. 110 (5): 417–423. doi:10.2307/3647828. JSTOR 3647828.

semanticscholar.org

api.semanticscholar.org

Pieter Maritz and Sonja Mouton (2012). "Francis Guthrie: A Colourful Life". The Mathematical Intelligencer. 34 (3): 67–75. doi:10.1007/s00283-012-9307-y. S2CID 121812208.

springer.com

link.springer.com

Pieter Maritz and Sonja Mouton (2012). "Francis Guthrie: A Colourful Life". The Mathematical Intelligencer. 34 (3): 67–75. doi:10.1007/s00283-012-9307-y. S2CID 121812208.