Envelope modelling of impulse response functions of systems having a high modal density. - P. Davies; Joe K. Hammond (ICASSP, 1984)

Bounds on the envelopes of the response of systems to bandlimited inputs. - Joe K. Hammond; P. Davies (ICASSP, 1985)

Envelope and instantaneous phase methods for the propagation of transients through oscillatory nonlinear systems. - P. Davies; Joe K. Hammond (ICASSP, 1986)