G. LV and H. ZHAO, “Joint Factor Analysis of Channel Mismatch in Whispering Speaker Verification”, Arch. Acoust., vol. 37, no. 4, pp. 555–559, Oct. 2013, Accessed: Jun. 10, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/84