Second- and third-order wigner distributions in hierarchical recognition of speech phonemes. - Maria Rangoussi; Flemming Pedersen (EUROSPEECH, 1995)

The Gabor expansion based positive distribution. - Flemming Pedersen (ICASSP, 1998)

A Gabor expansion-based positive time-dependent power spectrum. - Flemming Pedersen (IEEE Trans. Signal Process., 1999)