Malchaire, J., Rogowsky, M., Vanderputten, M., & Wallemacq, M. (1986). [Evaluation of Physical Workload By Continuous Heart-rate Recording in the Automobile-industry]. Le Travail Humain, 49(1), 75-87. https://hdl.handle.net/2078.5/141510 (Original work published 1986)