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\bibitem{Illgen+Ackermann2019} Illgen, M., \& Ackermann, H. (2019). In S. K{\"o}ster, M. Reese, \& J. {\textquoteright}e Zuo (Eds.), \textit{Urban Flood Prevention: Technical and Institutional Aspects from Chinese and German Perspective} (pp. 173--193). Cham: Springer International Publishing.

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