DAENGSI, T.; WUTIWIWATCHAI, C.; PREECHAYASOMBOON, A.; SUKPARUNGSEE, S. IP Telephony: Comparison of Subjective Assessment Methods for Voice Quality Evaluation. Walailak Journal of Science and Technology (WJST), [S. l.], v. 11, n. 2, p. 87–92, 2013. Disponível em: https://wjst.wu.ac.th/index.php/wjst/article/view/577. Acesso em: 2 may. 2024.