Pengfei Sun, Guanyong Feng, Hongwu Huang, Shuiting Zhou, Ningning Wang, Chaozhi Qiu. “Experimental and Theoretical Studies on Cavity Modal Characteristics of Radial Tire”. Design Engineering, Dec. 2020, pp. 801 -9, http://thedesignengineering.com/index.php/DE/article/view/1040.