Marathon world record progression - Wikipedia

Marathon - Wikipedia

Marathon - Wikipedia

Group evolution patterns in running races - ScienceDirect

Olympics: Technical Advances

How likely is it that we will see more world records broken in marathon running in the near future? - Quora

Marathon - Wikipedia

Why is the use of pace setters in a marathon disallowed for world record attempts? - Quora

Someone like you

Eliud Kipchoge plans 'superhuman' 1:59 marathon in London in

Marathon world record progression - Wikipedia

What is the point of breaking world records in running and other sporting events? - Quora

Marathon world record progression - Wikipedia