Trzmiel, Tomasz, Anna Pieczyńska, Ewa Zasadzka, and Mariola Pawlaczyk. “Respiratory Function and Muscle Strength Vs. Past Work Type: A Cross-Sectional Study Among Retirees”. Canadian Geriatrics Journal 24, no. 4 (December 1, 2021): 297–303. Accessed May 16, 2022. https://cgjonline.ca/index.php/cgj/article/view/501.