Vojtech Stejskal Nikolaos G. Bourbakis Anna Esposito Empty Speech Pause Detection in Spontaneous Speech. 237-242 2009 ICTAI http://doi.ieeecomputersociety.org/10.1109/ICTAI.2009.90 conf/ictai/2009 db/conf/ictai/ictai2009.html#StejskalBE09