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J. J. Hornung and M. Reich. 2014. Metatetrapous valdensis Nopcsa, 1923 and the Presence of Ankylosaur Tracks (Dinosauria: Thyreophora) in the Berriasian (Early Cretaceous) of Northwestern Germany. Ichnos 21(1):1-18
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S. Sachs and J. J. Hornung. 2013. Ankylosaur remains from the Early Cretaceous (Valanginian) of northwestern Germany. PLoS One 8(4):e60571:1-7
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