Robertson, A. and Zeilberger, D. 1998. A 2-Coloring of $[1,N]$ can have $(1/22)N^2+O(N)$ Monochromatic Schur Triples, but not less!. The Electronic Journal of Combinatorics. 5, 1 (Mar. 1998), R19. DOI:https://doi.org/10.37236/1357.