P. Staroniewicz, “Tests of robustness of GMM speaker verification in VoIP telephony”, Arch. Acoust., vol. 32, no. 4(S), pp. 187–192, Jan. 2014, Accessed: Jan. 17, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/1408