The use of the Wigner-Ville spectrum as a method of identifying/Characterising nonlinearities in systems. - Panos Georgiou Adamopoulos; J. K. Hammond (ICASSP, 1987)

The Wigner distribution, multi-equilibria nonlinear systems and chaotic behaviour. - Panos Georgiou Adamopoulos; J. K. Hammond; J. S. Lee (ICASSP, 1988)