NORDESJÖ LARS-OLOF. “Estimation of the Maximal Work Rate Sustainable for 6 Minutes Using a Single-Level Load or Stepwise Increasing Loads”. Upsala Journal of Medical Sciences 79, no. 1 (March 1, 1974): 45-50. Accessed April 19, 2024. https://ujms.net/index.php/ujms/article/view/7417.