ラムゼー理論
↑ Graham, R.; Rothschild, B.; Spencer, J. H. (1990), Ramsey Theory (2nd ed.), New York: John Wiley and Sons, ISBN 0-4715-0046-1 .
↑ Furstenberg, Hillel; Katznelson, Yitzhak (1991), “A density version of the Hales–Jewett theorem”, Journal d'Analyse Mathématique 57 (1): 64–119, doi:10.1007/BF03041066 .