1. “Cyclohexanone ammoximation: A break through in the ɛ-caprolactam production process”;Roffia;Stud. Surf. Sci. Catal.,1990
2. “One-step synthesis of ɛ-caprolactam from cyclohexane and nitrosyl sulfuric acid catalyzed by VPO supported transition metal composites”;You;Catal. Commun.,2008
3. Roffia, P., Padovan, M., Leofanti, G., Mantegazza, M., de Alberti, G., Tauszik, G.R., “Catalytic process for the manufacture of oximes”, US Pat., 4794198 (1988).
4. Taramasso, M., Perego, G., Notari, B., “Preparation of porous crystalline synthetic material comprised of silicon and titanium oxides”, US Pat., 4410501 (1983).
5. “Catalytic properties of crystalline titanium-silicalite III Ammoximation of cyclohexanone”;Thangaraj;J. Catal.,1991