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Dortmund: Verlag Kettler, [2021]
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Bönen: Kettler, c 2012
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Herne, 2012
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Bochum: Museum, [2001]
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Otterndorf: Studio A, 2005
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Dortmund: Kettler, 2014
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Berlin; Boston: De Gruyter, 2022
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MDPI AG, 2024
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MDPI AG, 2023
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MDPI AG, 2022
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MDPI AG, 2020
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American Astronomical Society, 2008
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American Astronomical Society, 2010
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Ovid Technologies (Wolters Kluwer Health), 2014
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Elsevier BV, 2021