ŁOPATKA, Kuba, Józef KOTUS, and Andrzej CZYŻEWSKI. “Application of Vector Sensors to Acoustic Surveillance of a Public Interior Space”. Archives of Acoustics 36, no. 4 (December 31, 2011): 851–860. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/148.