Joseph Tepperman Louis Goldstein Sungbok Lee Shrikanth S. Narayanan Automatically rating pronunciation through articulatory phonology. 2771-2774 2009 INTERSPEECH https://doi.org/10.21437/Interspeech.2009-708 conf/interspeech/2009 db/conf/interspeech/interspeech2009.html#TeppermanGLN09