DZIECHCIOWSKI, Zygmunt Szczepan, and Marek S. KOZIEŃ. “Identification of the Types of Measured Acoustic Modes Inside the Operator’s Cab in a Bulldozer”. Archives of Acoustics, vol. 39, no. 4, Dec. 2014, pp. 653-6, https://doi.org/10.2478/aoa-2014-0071.