On-line RBFNN based identification of rapidly time-varying nonlinear systems with optimal structure-adaptation. - Giorgos Apostolikas; Spyros G. Tzafestas (Math. Comput. Simul., 2003)

Improved QMDP Policy for Partially Observable Markov Decision Processes in Large Domains: Embedding Exploration Dynamics. - Giorgos Apostolikas; Spyros G. Tzafestas (Intell. Autom. Soft Comput., 2004)