1. Ahmed, N. U., andTeo, K. L.,Optimal Control of Distributed Parameters Systems, North-Holland, Amsterdam, Holland, 1981.
2. Ahmed, N. U.,Optimal Control of a Class of Strongly Nonlinear Parabolic Systems, Journal of Mathematical Analysis and Applications, Vol. 61, pp. 188–207, 1977.
3. Ahmed, N. U.,Existence of Optimal Controls for a Class of Systems Governed by Differential Inclusions on a Banach Space. Journal of Optimization Theory and Applications, Vol. 50, pp. 213–237, 1986.
4. Ahmed, N. U.,Existence of Optimal Relaxed Controls for Differential Inclusions on Banach Space, Nonlinear Analysis and Applications, Edited by V. Lakshmikantham, Marcel Dekker, New York, New York, pp. 39–49, 1987.
5. Pitman Research Notes in Mathematics Series;N. U. Ahmed,1988