Ding, Haizhou, Qiang Zhu, and Hongming Lyu. 2020. “Identification of Contact Stiffness Between Brake Disc and Brake Pads Using Modal Frequency Analysis”. Journal of Engineering and Technological Sciences 52 (4):468-80. https://doi.org/10.5614/j.eng.technol.sci.2020.52.4.2.