Limited parameter hidden Markov models for connected digit speaker verification over telephone channels. - Johan de Veth; Guido Gallopyn; Hervé Bourlard (ICASSP (2), 1993)

Speaker verification over telephone channels based on concatenated phonemic hidden Markov models. - Johan de Veth; Guido Gallopyn; Hervé Bourlard (EUROSPEECH, 1993)

Comparison of acoustic features and robustness tests of a real-time recogniser using a hardware telephone line simulator. - Hugo Van hamme; Guido Gallopyn; Ludwig Weynants; Bart D'hoore; Hervé Bourlard (ICSLP, 1994)