1. N.U. Ahmed, Optimization and Identification of Systems Governed by Evolution Equations on Banach Space, vol. 184 (Longman Scientific & Technical/John Wiley & Sons, London/New York, 1988)
2. N.U. Ahmed, Semigroup Theory with Applications to Systems and Control (Longman Scientific and Technical UK, 1991)
3. N.U. Ahmed, Optimal control of hydrodynamic flow with possible application to artificial heart. Dyn. Syst. Appl. 1, 103–120 (1992)
4. N.U. Ahmed, Optimal relaxed controls for nonlinear infinite dimensional stochastic differential inclusions. In Optimal Control of Differential Equations (CRC Press, 1994), pp. 1–19
5. N.U. Ahmed, Optimal control of infinite dimensional systems governed by functional differential inclusions. Discuss. Math. Differential Inclusions Control Optim. 15, 75–94 (1995)