Minette, P., Dubois, P., & Delwiche, J. P. (1985). Validity of Air-helium Dvmax Measurements in Trials of Bronchodilators. Bulletin Europeen de Physiopathologie Respiratoire, 21(4), 357-362. https://hdl.handle.net/2078.5/63451 (Original work published 1985)