1. The Hamiltonian formulation of energy conserving physical systems with external ports;van der Schaft;Archiv für Elektronik und Übertragungstechnik,1995
2. On representations and integrability of mathematical structures in energy-conserving physical systems;Dalsmo;SIAM Journal on Control and Optimization,1999
3. L2-Gain and Passivity Techniques in Nonlinear Control;van der Schaft,1996
4. Port-controlled Hamiltonian systems: towards a theory for control and design of nonlinear physical systems;van der Schaft;Journal of the Society of Instrument and Control Engineers of Japan (SICE),2000
5. Putting energy back in control;Ortega;Control Systems Magazine,2001