Stability analysis of nonlinear systems using frozen stationary linearization. - Anders Hansson; Anders Helmersson; Torkel Glad (ACC, 2004)

Power Series Solution of the Hamilton-Jacobi-Bellman Equation for Descriptor Systems. - Johan Sjöberg; Torkel Glad (CDC/ECC, 2005)

Hamilton-Jacobi equations for nonlinear descriptor systems. - Torkel Glad; Johan Sjöberg (ACC, 2006)