1. Double minimum in the surface stabilized ferroelectric liquid crystal switching response
2. Azad, A.S. Design of primary sewage treatment plant, Madras Agric. J., 272 – 273 (1994).
3. Besnarek, W. and Tkaczyk, P. Waste water treatment and disposal, Agric. Res. J., 50 – 72, (2001).
4. Diouf, Jacques, Journal of FAO,2003 Q&A with FAO Director-General.
5. Birdie, G.S and J.S. Birdie, Water supply and sanitary engineering, 50 –120, 1997.