Kajackas, A., A. Anskaitis, and D. Gursnys. “Method for Conversational Voice Quality Evaluation in Cellular Networks”. Elektronika ir Elektrotechnika 109, no. 3 (March 7, 2011): 105-108. Accessed March 28, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/182.