HEJCZYK, Tomasz, and Tadeusz PUSTELNY. “Analysis of the Saw System With the PANI + Nafion Sensing Structure for Detection of Low Concentration Carbon Monoxide”. Archives of Acoustics, vol. 45, no. 4, Nov. 2020, pp. 681–686, https://doi.org/10.24425/aoa.2020.135274.