1. Wunsch, J.R.: Polystyrene: Sythesis, Production and Applications. Rapra Technology Ltd., Akron (2000)
2. Gentry, J.C., Kumar, S., Wright-Wytcherley, R.: Used extractive distillation to simplify petrochemical processes. Hydrocarb. Process. 93, 62 (2004)
3. Randall, G.A.: Method of separating ethylbenzene from styrene by low pressure drop distillation,
http://www.google.com/patents/US3084108
U.S. Patent 3,084,108 (1963)
4. Van Tassell, H.M.: Separation of ethylbenzene and styrene by low pressure, high temperature distillation,
http://www.google.com/patents/US3398063
, U.S. Patent 3,398,063 (1968)
5. Welch, V.A.: Cascade reboiling of ethylbenzene/styrene columns. U.S. Patent 6,171,449 B1 (2001)