Green, B., & Tao, T. (2006). New bounds for Szemeredi's theorem, II: A new bound for $r_4(N)$.
Chicago Style (17th ed.) CitationGreen, Ben, and Terence Tao. New Bounds for Szemeredi's Theorem, II: A New Bound for $r_4(N)$. 2006.
MLA (9th ed.) CitationGreen, Ben, and Terence Tao. New Bounds for Szemeredi's Theorem, II: A New Bound for $r_4(N)$. 2006.
Warning: These citations may not always be 100% accurate.