SQEL: A Multilingual and Multifunctional Dialogue System - Aretoulaki, Maria; Harbeck, Stefan; Gallwitz, Florian; Nöth, Elmar; Niemann, Heinrich; Ivanecky, Josef; Ipsic, Ivo; Pavesic, Nikola; Matoušek, Václav (Proc. Int. Conf. on Spoken Language Processing, 1998)