N. S. Al-Muaikel, S. S. Al-Diab, and H. Z. Al-Khathlan, “Radical Copolymerization and Charaterization of N-(Tri-n-Butyltin) Maleimide Monomer with Styrene, Methyl Methacrylate and N-Vinyl-2-Pyrrolidinone”, ajc, vol. 11, no. 4, pp. 1259–1264, Mar. 2010.