Yadav, P. K., S. Gupta, and D. Kumar. “Machine Performance Index (MPI): A Method to Evaluate the Performance of Mining Dumper”. Journal of Mines, Metals and Fuels, vol. 67, no. 6, Oct. 2022, pp. 320-5, https://informaticsjournals.com/index.php/jmmf/article/view/31567.