1. B. L. Van-der-Waerden, Nieuw Arch. Wisk 15, 212–216 (1927).
2. R. L. Graham, B. K. Rothschild, and J. H. Spencer, Ramsey Theory (Wiley, New York, 1990).
3. I. D. Shkredov, Russ. Math. Surv. 61, 1101–1166 (2006).
4. T. Sanders, Ann. Math. 174(1), 619–636 (2011).
5. B. Green and T. Tao, in Analytic Number Theory: Essays in Honor of Klaus Roth (Cambridge Univ. Press, Cambridge, 2009), pp. 180–204.