P. SONG, Y. JIN, L. ZHAO, and C. ZOU, “Voice Conversion Based on Hybrid SVR and GMM”, Arch. Acoust., vol. 37, no. 2, pp. 143–149, Oct. 2013, Accessed: Jun. 10, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/107