1. ‘Evaluation of Plastic Filler Applications for Leached Fly Ash’, Electric Power Research Institute, Ontario Research Foundation, Mississauga, Ontario, Canada, Sept. 1986.
2. P.K. Rohatgi, R. Guo, B.N. Keshevaram, P. Huang, in: T.J. Srivatsan, J.T. Moore (Eds.), Proceedings of International Symposium on Processing and Fabrication of Advanced Materials IV, ASM International, Cleveland, Ohio, 1995, p. 889.
3. Strength Properties of Polyester Mortar Using PET and Fly Ash Wastes
4. E.C. Barber, Reduce Part Weight and Cast with Hollow Microspheres for Plastics, 3M Company, Technical Report, St. Paul, 1999.
5. Proceedings of Hollow and Solid Spheres and Microspheres;Wilcox,1994