S.  el-Kheshen, Zia, H., Badawi, A., Needham, T. E., and Luzzi, L. A., 
“Coating charcoal with polyacrylate-polymethacrylate copolymer for haemoperfusion. III: The effect of the coat thickness on the adsorptioncapacity of the coated charcoal and its adsorptivity to small and middle size molecules”, 
J Microencapsul, vol. 12, pp. 505-14, 1995.