1. An analysis of the adjoint problem approach for parabolic inverse source problem with measured Dirichlet data, The Third International Conference "Inverse Problems: Modeling and Simulation", May 29-June 02, 2006, Fethiye, Turkey.

2. Differentiability and Lipschitz property of the cost function related to parabolic optimal control problems, International Conference, Pioneers Of Bulgarian Mathematics, July 8-10, 2006, Sofia, Bulgaria.

3. An analysis of the cost functional for parabolic inverse source problem, The International Conference on Modeling and Simulation (MS2006), August 28-30 2006, Konya, Turkey.

4. An adjoint problem approach for coefficient identification in a linear hyperbolic problem, The ISAAC (International Society for Analysis, its Applications and Computation) , August 13-18 , 2007, Ankara, Turkey