Kelemen, Bence, Ottó Benczenleitner, and László Tóth. “The Norwegian Double-Threshold Method in Distance Running: Systematic Literature Review”. Scientific Journal of Sport and Performance 3, no. 1 (December 12, 2023): 38–46. Accessed May 14, 2024. https://sjsp.aearedo.es/index.php/sjsp/article/view/norwegian-double-threshold-method-distance-running.