Sofia Kim. “Text-to-Speech Synthesis - Techniques and Evaluation: Analyzing Techniques and Evaluation Metrics for Text-to-Speech (TTS) Synthesis Systems for Converting Text Input into Spoken Audio Output”. African Journal of Artificial Intelligence and Sustainable Development, vol. 1, no. 1, May 2021, pp. 31-36, https://africansciencegroup.com/index.php/AJAISD/article/view/29.