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von Klitzing, K.; Chakraborty, T.; Kim, P.; Madhavan, V.; Dai, X.; McIver, J.; Tokura, Y.; Savary, L.; Smirnova, D.; Rey, A. M. et al.; Felser, C.; Gooth, J.; Qi, X.: 40 years of the quantum Hall effect. Nature Reviews Physics
2, pp. 397 - 401 (2020)