Doubly-Indexed Dynamical Systems: State-Space Models and Structural Properties. - Ettore Fornasini; Giovanni Marchesini (Math. Syst. Theory, 1978)

On the Problems of Constructing Minimal Realizations for Two-Dimensional Filters. - Ettore Fornasini; Giovanni Marchesini (IEEE Trans. Pattern Anal. Mach. Intell., 1980)

State space approach to two dimensional filters. - Ettore Fornasini; Giovanni Marchesini (ICASSP, 1982)

On the structure of finite memory and separable two-dimensional systems. - Ettore Fornasini; Giovanni Marchesini; Maria Elena Valcher (Autom., 1994)