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2. Lagrangian theory of large scale systems;Jonckheere,1981
3. Passivity-based Control of EulerLagrange Systems;Ortega,1998
4. Energy-shaping of port-controlled Hamiltonian systems by interconnection;Ortega,1999
5. Ortega R., van der Schaft A., Maschke B., Escobar G., Stabilization of port-controlled Hamiltonian systems: Energy-balancing and passivation, Automatica, (to appear)