How Much Further For The Sub-Two-Hour Marathon? The American Marathon and Book Author AMBY BUFTOOT has our work in https://www.dovepress.com/articles.php?article_id=39595 A little more about the magnifying glass and written a comment. This can be found under https://mathematicalrunner.com/2018/08/16/how-much-further-for-the-sub-two-hour-marathon/