1. B. Maschke, R. Ortega, A. van der Schaft, Modeling and control of physical systems: an approach based on energy and interconnection, in: Proc. 14th MTNS, Perpignan, France, 2000.
2. Interconnection of port-Hamiltonian systems and composition of Dirac structures;Cervera;Automatica,2007
3. Port-Hamiltonian systems: network modeling and control of nonlinear physical systems;van der Schaft,2004
4. Putting energy back in control;Ortega;IEEE Control System Magazine,2001
5. Interconnection and damping assignment passivity-based control of port-controlled Hamiltonian systems;Ortega;Automatica,2002