Balcerzak, Andrzej, and Genady Zhavnerko. “Ultrasonic Chemical Sensor for Detection of Aliphatic and Aromatic Hydrocarbons in Air”. Archives of Acoustics 32, no. 4(S) (January 31, 2007): 53–58. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1388.