Kajackas, A., and A. Šaltis. “The Models of Voice Signals’ „Voice” and „Silence” Intervals and Their Use”. Elektronika ir Elektrotechnika 47, no. 5 (August 20, 2003). Accessed April 20, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/11253.