Zingg, Matthias Alexander, Christoph Alexander Rust, Thomas Rosemann, Romuald Lepers, and Beat Knechtle. “Runners in Their Forties Dominate Ultra-Marathons from 50 to 3,100 Miles”. Clinics 69, no. 3 (March 1, 2014): 203–211. Accessed April 28, 2025. https://www.revistas.usp.br/clinics/article/view/77113.