P. Balaji, M. Muralidharan, A. Arun, E. Prakash, R. Chandan Singh, and K. Boobalan, “Analysis and Conversion of Air Suspension System to Parabolic Leaf Spring Suspension System”, IJET, vol. 7, no. 2.33, pp. 1298–1301, Jun. 2018, doi: 10.14419/ijet.v7i2.33.18124.