N. S. Khettou, M. M. Demić, S. R. Muždeka, and M. M. Krsmanović, “Contribution to the modeling of a pneumatic semi-active control of vehicle suspension”, Vojnoteh. glas., vol. 63, no. 4, pp. 99–115, May 2015, doi: 10.5937/vojtehg63-7744.