M. Hubert, S. Kutter, M. Ziegler, M. Schneider, and J. Franke "Rotary Cutting of Electrical Steel Laminations – A Contrast to Traditional Stamping", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1107–1113, 2017, doi: 10.25046/aj0203140.