Köster, O., Kehrein, R., Masthoff, K., & Boubaker, Y. H. (2012). The tell-tale accent: Identification of regionally marked speech in German telephone conversations by forensic phoneticians. International Journal of Speech, Language and the Law, 19(1), 51–71. https://doi.org/10.1558/ijsll.v19i1.51