T. KAMISIŃSKI, A. SZELĄG, and J. RUBACHA, “Sound Reflection from Overhead Stage Canopies Depending on Ceiling Modification”, archacoust, vol. 37, no. 2, pp. 213–218, Oct. 2013, Accessed: Jan. 13, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/115