A New Sufficient Criterion for the Stability of 2-D Discrete Systems. - Apostolos Kanellakis; Ayman Tawfik (IEEE Access, 2021)

Inverse and Direct Solutions of the Discrete Time Lyapunov Equation With System Matrix in Companion Form. - Apostolos Kanellakis; Ayman Tawfik; Panajotis Agathoklis (IEEE Access, 2021)

Canonical State-Space Realization of 3-D Separable Denominator Discrete Systems. - Apostolos Kanellakis; Ayman Tawfik; Panajotis Agathoklis (IEEE Access, 2025)