ARTICLE Madikeri_IJST_2014/IDIAP MODIFIED GROUP DELAY FEATURE BASED TOTAL VARIABILITY SPACE MODELLING FOR SPEAKER RECOGNITION Madikeri, Srikanth T, Asha Murthy, Hema A International Journal of Speech Techonology 18 1 17-23 1381-2416; 1572-8110 2014 10.1007/s10772-014-9243-7 doi