Geometric discretization of fluid dynamics. - Jesús Clemente-Gallardo; Ricardo Lopezlena; Jacquelien M. A. Scherpen (CDC, 2002)

Energy functions for dissipativity-based balancing of discrete-time nonlinear systems. - Ricardo Lopezlena; Jacquelien M. A. Scherpen (Math. Control. Signals Syst., 2006)

A geometric approach to nonlinear dissipative balanced reduction I: exogenous signals. - Ricardo Lopezlena (Math. Control. Signals Syst., 2013)

A geometric approach to nonlinear dissipative balanced reduction II: internal isometries. - Ricardo Lopezlena (Math. Control. Signals Syst., 2013)