Follow-up question handling in the IMIX and Ritel systems: A comparative study.

B. W. van Schooten R. Op den Akker Sophie Rosset Olivier Galibert Aurélien Max Gabriel Illouz Follow-up question handling in the IMIX and Ritel systems: A comparative study. 97-118 2009 15 Natural Language Engineering 1 http://dx.doi.org/10.1017/S1351324908004920 db/journals/nle/nle15.html#SchootenARGMI09