1. Waldmann G. (2018). 'Korschenbroich'.
  2. Waldmann G., Herten F., Hiltl H., Ernstson K. (2018). The enigmatic Niederrhen (Germny) Deposit: Evidence ofa middle-pleistocene meteorite impact strewn field // 49th Lunar and Plan. Sci. Conf. 2018 (LPI Contrib. No.2083).
  3. Ernstson K., Pobekel J. (2023). Pingos and mardels: high-resolution digital terrain models suggest meteorite impact craters in addition to permafrost, sinkhole and dead-ice formation models.


Niederrhein-Impakt: Digitales Gelandemodell DGM 1
(Waldmann, 2018).



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