- https://www.health.com/condition/infectious-diseases/coronavirus/does-wearing-face-mask-increase-co2-levels
- https://abcnews.go.com/US/driver-crash-passed-wearing-n95-mask-long-police/story?id=70346532
- Patel S, Miao JH, Majmundar SH. Physiology, Carbon Dioxide Retention. [Updated 2020 Feb 12]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK482456/