1. Goldberger, W. M., “Collection of Fly Ash in a Self Agglomerating Fluidized Bed Coal Burner”, ASME paper, 67-WA/FU-3, Nov., 1967.
2. Behaviour of Mineral Matter in a Fluidized Bed Gasifying Coal;Kolodney;The Ignifluid Process 'Trans. Brit. Ceram. SOC,1976
3. Langston, B. G., and F. M. Stephens, “Self Agglomerating Fluidized Bed Reduction”, Journal of Metals, p 312, April 1960.