BORUCKI, Sebastian, Tomasz BOCZAR, and Andrzej CICHON. “Technical Possibilities of Reducing the Sound Pressure Level Emitted into the Environment by a Power Transformer”. Archives of Acoustics 36, no. 1 (March 31, 2011): 49–56. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/195.