Chul-Woo Lee and Jared Duke (2007), Coarse Function Value Theorems. Rose-Hulman Undergraduate Mathematics Journal 8 (2) https://scholar.rose-hulman.edu/cgi/viewcontent.cgi?article=1198&context=rhumj
Chul-Woo Lee and Jared Duke (2007), Coarse Function Value Theorems. Rose-Hulman Undergraduate Mathematics Journal 8 (2) https://scholar.rose-hulman.edu/cgi/viewcontent.cgi?article=1198&context=rhumj