Ingram, J.C.L., R. Prandolini, and S. Ong. “Formant Trajectories As Indices of Phonetic Variation for Speaker Identification”. International Journal of Speech, Language and the Law 3, no. 1 (June 1, 1996): 129–145. Accessed November 22, 2024. https://journal.equinoxpub.com/IJSLL/article/view/10111.