Dijana Petrovska-Delacrétaz Asmaa El Hannani Gérard Chollet Text-Independent Speaker Verification: State of the Art and Challenges. 135-169 2005 conf/wnsp/2005 WNSP http://dx.doi.org/10.1007/978-3-540-71505-4_9 db/conf/wnsp/wnsp2005.html#Petrovska-DelacretazHC05