Küpper, T., Heussen, . N., Morrison, A., Schöffl, V., Basnyat, B., Hillebrandt, D., Milledge, J., Steffgen, J. and Meier, B. (2021) “The Borg Scale at high altitude”, Health Promotion & Physical Activity, 15(2), pp. 1–8. doi: 10.5604/01.3001.0014.9500.