Stauskis, Vytautas J. “The Effect of Location of Sound-Absorbing Materials in Calculating the Reverberation Time of the Hall by Different Formulas”. Journal of Civil Engineering and Management 9, no. 2 (June 30, 2003): 83-87. Accessed May 16, 2021. https://journals.vgtu.lt/index.php/JCEM/article/view/9018.