1. American Public Health Organisation (1992) Standard Methods for the Examination of Water and Wastewater, 18th edn
2. Aptel P. and Buckley C. A. (1996) Categories of membrane operation. In Water Treatment Membrane Processes, eds. J. Mallevialle, P. E. Odendaal and M. R. Wiesner, pp. 2.1–3.1. AWWA Research Foundation, McGraw-Hill
3. Blume I., Koenhen D. M. and Roesink H. D. W. (1995) Cross flow versus dead-end in large scale ultrafiltration processes. Euromembrane `95, pp. 1–6. Bath
4. Zero discharge/water reuse: the opportunities for membrane technologies in pollution control;Cartwright;Desalination,1991
5. Upgrading oil refinery effluents by cross flow ultrafiltration;Elmaleh;Water Sci. Technol.,1996