1. Shiau D.W.andSmith E.(1985).Low formaldehyde emission urea‐formaldehyde resins containing a melamine additive. US Patent 4 536 245. Borden Inc. Columbus OH.
2. Breyer R.A. Hollis S.G. andJural J.J.(1997).Low mole ratio melamine‐urea formaldehyde resin. US Patent 5 681 917. Georgia‐Pacific Resins Inc. GA.