Hedenström Hans, Malmberg Per, and Fridriksson Hrafn V. “Reference Values for Lung Function Tests in Men: Regression Equations With Smoking Variables”. Upsala Journal of Medical Sciences 91, no. 3 (September 1, 1986): 299-310. Accessed April 25, 2024. https://ujms.net/index.php/ujms/article/view/6916.