Gindulis, M., Netzer, N., Burtscher, M., Gatterer, H., Schmidt, C., Morrison, A., & Küpper, T. (2021). Extreme sleep fragmentation for 11 consecutive days and nights does not significantly alter total sleep time, and sleep stage distribution, during the continuous alpine downhill skiing world record. Health Promotion & Physical Activity, 17(4), 18–24. https://doi.org/10.5604/01.3001.0015.6743