Documented Swims Marathon Swimmers Federation

New Zealand Marathon Swimming Federation » NZMSF

Endurance swimmer Diana Nyad: 'It's about having a steel-trap mind', Swimming

Swimming Federation of India

These charts clearly show how some Olympic swimmers may have gotten an unfair advantage - The Washington Post

Marathon swims - Openwaterpedia

International Marathon Swimming Hall of Fame - Openwaterpedia

Gracie O'Connell - Redondo Beach to LAX

Martyn Webster - Lake Annecy Marathon Swimmers Federation

Rob McGlashan - Oakville to Burlington