Ibrahim Najm, M., A. Dahham Younis, and F. Ahmed Majeed. “Mathematical Modelling and PID Controller Implementation to Control Linear and Nonlinear Quarter Car Active Suspension”. Al-Rafidain Engineering Journal (AREJ), vol. 28, no. 2, Sept. 2023, pp. 113-21, doi:10.33899/rengj.2023.137327.1216.