A. Balcerzak and G. Zhavnerko, “Ultrasonic chemical sensor for detection of aliphatic and aromatic hydrocarbons in air”, Arch. Acoust., vol. 32, no. 4(S), pp. 53–58, Jan. 2014, Accessed: Jan. 18, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/1388