Kabir, Md. Shaha Nur, et al. “Measurement and Evaluation of Whole Body Vibration of Agricultural Tractor Operator”. International Journal of Agricultural and Biological Engineering, vol. 10, no. 1, Jan. 2017, pp. 248-55, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/2113.