M. Liewald, M. Barthau, and S. Wagner. 7th International Conference on Tube Hydroforming, Xian, China, Proceedings of the 7th International Conference on Tube Hydroforming,; Xian; China; 2015, (2015)
R. Radonjic, M. Liewald, and F. Han. 12. International Conference on Accomplishments in Electrical and Mechanical Engineering and Information Technology, Banja Luka, Republic of Srpska, Bosnia and Herzegovina, (2015)
S. Hönle, M. Liewald, M. Sindel, and P. Schmid. Documentation of the 14th Stuttgart International Symposium. Automotive and Engine Technology (FKFS), (2014)