“The whole principle came from the idea”
: Matt Slater, “Olympics Cycling: Marginal Gains
Underpin Team GB Dominance,” BBC, August 8, 2012,
https://www.bbc.com/sport/olympics/19174302
.
Brailsford and his coaches began by making small adjustments
: Tim Harford, “Marginal Gains
Matter but Gamechangers Transform,” Tim Harford, April 2017,
http://timharford.com/2017/04/marginal-gains-matter-but-gamechangers-transform
.