Geodesic
A note on the Ramsey number and the planar Ramsey number for C₄ and complete graphs
Discussiones Mathematicae. Graph Theory, Tome 19 (1999) no. 2, pp. 135-142

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We give a lower bound for the Ramsey number and the planar Ramsey number for C₄ and complete graphs. We prove that the Ramsey number for C₄ and K₇ is 21 or 22. Moreover we prove that the planar Ramsey number for C₄ and K₆ is equal to 17.
Keywords: planar graph, Ramsey number 
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     title = {A note on the {Ramsey} number and the planar {Ramsey} number for {C₄} and complete graphs},
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Bielak, Halina. A note on the Ramsey number and the planar Ramsey number for C₄ and complete graphs. Discussiones Mathematicae. Graph Theory, Tome 19 (1999) no. 2, pp. 135-142. http://geodesic.mathdoc.fr/item/DMGT_1999_19_2_a1/