Pribil, J., A. Pribilova, and J. Matousek. “Comparison of Formant Features of Male and Female Emotional Speech in Czech and Slovak”. Elektronika ir Elektrotechnika 19, no. 8 (September 26, 2013): 83-88. Accessed November 25, 2020. https://eejournal.ktu.lt/index.php/elt/article/view/1739.