1. PAWELSKI, O.: Comparison of Testing Methods for Hot Formability of Metals, in: Hot Forming and Hot Formability (in German), Symp. Bad Nauheim, Deutsche Gesellschaft fur Metallkunde (DGM), Oberursel 1976
2. KRAUSE, U.: Comparison of Different Methods of Determining Flow Stress in Cold Forming (in German), Thesis, TH Hannover 1962
3. (Ed.) LANGE, K.: Metal Forming Vol. 1. Fundamentals (in German), Springer-Verlag, Berlin/Heidelberg/New York 1972
4. PÖHLANDT, K.: Comparison of Methods for Testing the Plastic Properties of Metallic Materials (in German), Berichte aus dem Institut für Umformtechnik, Universität Stuttgart, Nr. 80, Berlin/Heidelberg/New York/Tokyo: Springer 1984
5. WEBER, K.-H.: The Hot Torsion Test as a Measure of Hot Formability of Metals, Thesis, BA Freiburg 1968