Chandrasekaran B. K., van der Lee L., Hulme I., Kantzas A. A simulation and experimental study of the hydrodynamics of a bubbling fluidized bed of linear low density polyethylene using bubble properties and pressure fluctuations. Macromolecular Materials and Engineering. 2005 Jun 24;290(6):592-609. http://dx.doi.org/10.1002/mame.200500065.