What's the fastest swimming stroke? - 220 Triathlon
How to increase the power of your swimming strokes - Quora
Here is How Swimmers of All Levels Train (According to Coaches) – A3 Performance
Top five tips for a long-distance swim challenge - Outdoor Swimmer Magazine
Total Immersion: How I Learned to Swim Effortlessly in 10 Days and You Can Too - The Blog of Author Tim Ferriss
What's swimming style swim at slowest speed for long distance? In other words, which swimming style uses at least energy? - Quora
Swimming Workouts: The 40 Ultimate Practices for Swimmers
Swimming Workouts That Build Strength
The Long-distance Swimmer - The arena swimming blog