@book{ BB27573949, author = "Weigand, Hans-Georg and McCallum, William Gordon and Menghini, Marta and Neubrand, Michael and Schubring, Gert", title = "The legacy of Felix Klein", publisher = "Springer Open", year = "2019", series = "ICME-13 monographs / Series editor Gabriele Kaiser", number = "", URL = "https://ci.nii.ac.jp/ncid/BB27573949" }