I read this article ages ago and couldn’t find it again. Then, there it was referenced in an article by ExperiencePlus cycle tours. Filed here for future reference!
Perfect Pedaling: Get a Better Pedal Stroke - www.bicycling.com
Get the most energy from each crank revolution with these tips for proper pedaling
Via Back to Bicycling Basics: Bike Fit and Pedaling Technique - www.experienceplus.com