A. Singh, N. Nawayseh, L. P. Singh, S. Singh, and H. Singh, “Whole Body Vibration Exposure during Rotary Soil Tillage Operation:: The Relative Importance of Tractor Velocity, Draft and Soil Tillage Depth”, Int. J. Automot. Mech. Eng., vol. 15, no. 4, pp. 5927–5940, Dec. 2018.