1. Purchas, D. B., Industrial Filtration of Liquids, Leonard Hill, London, 1969.
2. Pedrrson, C. C. Filtrat. Separat. Nov/Dec. 1974
3. Rushton, A amp; Griffiths, P. V. R. Trans.Inst, Chera.Eng, Vol. 49, 1971, 49.
4. Bitter, J. G., Second World Filtration Congress Trans., Filtration Society, 1979, Uplands Press, Croydon.
5. McCregor, R., J. Soc. Dyers Col., 81, 1965, 429.