Kehlin, B. H., O. P. Boldyriev, O. V. Ivanov, and D. O. Stupin. 2004. “IMPROVING THE EFFICIENCY OF COMBINED FRICTION OF SHOCK-ABSORBING DEVICES ON THE BASIS OF THE PMK-110A”. Science and Transport Progress, no. 5 (December):85-95. https://doi.org/10.15802/stp2004/20503.