1. Internatinal Agency for Research on Cancer(2004).IRC classifies formaldehyde as carcinogen to humans Press release No. 153 15. WHO Lyon Cedex France.
2. California Air Resources Board(2008).California Code of Regulations Sections 93120‐93120.12 Title 17.
3. U. S. Senate Bill 1660(2011).American Jobs Act of 2011. ASTM E 1333 Large chamber form emission test.
4. DIN EN 120‐92(1992).Deutsches Institute fuer Normung. Berlin Germany.
5. Quantitative carbon-13 NMR study of urea-formaldehyde resins in relation to the formaldehyde emission levels