1. “Representations and symmetries of linear dynamical systems”;Fagnani;SIAM J. Contr. Opt,1993
2. Introduction to mathematical system theory: a behavioral approach;Polderman,1997
3. “State maps from bilinear differential forms”;Rapisarda,2010
4. State maps for linear systems;Rapisarda;SIAM J. Control Opt,1997
5. System theoretic descriptions of physical systems CWI Tract No. 3;van der Schaft,1984