Runners, baring your soles makes you well-heeled
Barefoot running easier on feet than running shoes
Walking, running and the evolution of short toes in humans
The Evolutionary Question Posed by Human Running Capabilities
Running Shoes May Cause Damage to Knees, Hips and Ankles, New Study Suggests
The painful truth about trainers
Harvard biologist Daniel Liebermann finds man is made to run — shoeless
SHOULD YOU BE RUNNING BAREFOOT?
To Run Better, Start by Ditching Your Nikes
Barefoot Running Debate in Runner's World Feb 2010 Issue
Barefoot Running: A Natural Step for the Endurance Athlete
Barefoot Running Wikipedia Page