Baesso, M. M., G. A. Martins, A. J. Modolo, R. C. E. Baesso, and E. M. Brandeleiro. “TECHNICAL NOTE: NOISE LEVEL EMITTED BY AGRICULTURAL TRACTORS IN ACCORDANCE WITH REGULATORY STANDARD NR 15 - DOI: 10.13083/1414-3984.V22n06a09”. Engineering in Agriculture, vol. 22, no. 6, Dec. 2014, pp. 583-8, doi:10.13083/reveng.v22i6.524.