Shuaibu Y.A, Ameh S.E, Abubakar J.A, Musa A.J, and Abubakar.G.M, “DEVELOPMENT OF ASBESTOS-FREE BRAKE PAD USING COCONUT SHELL POWDER AND COCONUT SHELL ASH AS FILLER MATERIALS WITH GUM ARABIC AS THE BINDER”, Int. j. innov. eng. res. technol., vol. 10, no. 4, pp. 112–120, Apr. 2023, doi: 10.17605/OSF.IO/UVXG8.