J.  Tsonnas, Chaillet, A., Panteley, E., and Johansen, T. A., ?Cascaded lemma for set-stable systems?, in Proc. IEEE Int. Conf. on Decision and Control, San Diego, USA, 2006. 

A.  Chaillet and Panteley, E., ?Stability of sets for nonlinear systems in cascade?, in MTNS 2006, Kyoto, Japan, 2006. 

E.  Kyrkjebo, Panteley, E., Chaillet, A., and Pettersen, K., ?A virtual vehicle approach to underway replenishment?, Tromsoe, Norway: Springer Verlag, 2006, pp. 171?189.