1. Beningson, R.M.,Beningson,H.E.,Narayananrutty,V.P.,Nadkarni,R.M.,Lamb,T.J., Fox, L.K. and W.V. Keary. 1975. Apparatus for disposal of solid wastes and recovery of fuel product therefrom.U.S. Patent 4,063, 903.
2. Bremer, A.R. 1975. Die-head. U.S. Patent 3,904, 340.
3. Edison, S.O. 1902. Process of treating fibres of annual growth for industrial purposes. U.S. Patent 704, 698.
4. Food and Agriculture Organization, Rome. 1978. Yearbook of Forest Product Griffin, W.T. 1908. Method of briquetting carbonaceous materials. U.S. Patent 905, 693.
5. Gunnerman, R.W. 1977. Fuel pellets and method for making them from organic fibrous materials. U.S. Patent 4,015, 951