1. The Development of Ring Rolling Technology
2. A. Lieb, “Minimierung von Formfehlern beim Ringwalzen,”, Ph.D. thesis, RWTH Aachen, 1992.
3. H. Meier and P. Lagao, “Identification of instabilities in radial-axial ring-rolling processes using multivariate detection methods,” in Advances in Manufacturing Technology – XIV, edited by R. Perryman and C. D. Ellis (IEE Inst Mech Engineers, Professional Engineering Publishing ltd., Westminster, 2000), pp. 345–349.
4. A. Lieb, H. Wiegels and R. Kopp, “Rundheitsmessungen an warmgewalzten Ringen,” in Stahl und Eisen 110 (9), 1990, pp. 83–87.
5. Measurement of Rings via Image Processing during and after Radial-Axial Ring Rolling