1. A.V. Ignatchenko, M. M. King, Z. Liu, C.W. Whiddon, US Patent 7659432, 2010.
2. C. Schommer, K. Ebel, T. Dockmer, M. Irgang, W. Holderich, H. Rust, US Patent 4950763, 1990.
3. J. Univ. Kuwait (Sci.) continued as Kuwait;Eweiss;J. Sci. Eng.,1982
4. D.R. McCoy, M.S. Kablaoui, US Patent 3979415, 1976.
5. New melamine–formaldehyde–ketone polymers. V. Coatings from melamine and MEK-based reactive solvents