P.-F. Liu, W.-M. Zhai, K.-Y. Wang, Q.-B. Feng, and Z.-G. Chen, “Theoretical and experimental study on vertical dynamic characteristics of six-axle heavy-haul locomotive on curve”, Transport, vol. 33, no. 1, pp. 291–301, Jan. 2018, doi: 10.3846/16484142.2016.1180638.