Solomon, W. C., M. T. Lilly, and J. I. Sodiki. “Production of Asbestos-Free Brake Pad Using Groundnut Shell As Filler Material”. International Journal of Science and Engineering Invention, vol. 4, no. 12, Dec. 2018, p. 21 to 27, doi:10.23958/ijsei/vol04-i12/116.