1. Formaldehyde and Cancer Risk (NIH): https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/formaldehyde/formaldehyde-fact-sheet.
2. Public health statement for formaldehyde: Agency for Toxic Substances and Disease Registry: https://www.atsdr.cdc.gov/PHS/PHS.asp?id=218&tid=39.
3. Formaldehyde gas sensors: a review;Chung;Sensors,2013
4. An update on formaldehyde. USA Consumer Products Safety Commission. https://www.cpsc.gov/PageFiles/121919/AN%20UPDATE%20ON%20FORMALDEHYDE%20final%200113.pdf.
5. What you should know about formaldehyde: CDC. https://www.cdc.gov/nceh/drywall/docs/whatyoushouldknowaboutformaldehyde.pdf.