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Dröse, Jennifer. “Mathematical and Linguistic Features of Word Problems in Grade 4 and 5 German Textbooks – A Compara-Tive Corpus Linguistic Approach.” Proceedings of the Third International Conference on Mathematics Textbook Research and Development , edited by S. Rezat et al., 2019, pp. 161–66.
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Kirschmer, Markus, and Gabriele Nebe. “Quaternary Quadratic Lattices over Number Fields.”10.1142/s1793042119500131__International Journal of Number Theory, vol. 15, no. 02, World Scientific Pub Co Pte Lt, 2019, pp. 309–25, doi:10.1142/s1793042119500131.
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Kirschmer, Markus. “Automorphisms of Even Unimodular Lattices over Number Fields.”10.1016/j.jnt.2018.08.004__Journal of Number Theory, vol. 197, Elsevier BV, 2019, pp. 121–34, doi:10.1016/j.jnt.2018.08.004.
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Hilgert, Joachim. “Lizhen Ji Und Athanase Papadopoulos (Hrsg.): Sophus Lie and Felix Klein: The Erlangen Program and Its Impact in Mathematics and Physics. European Mathematical Society 2015.”10.1007/s00591-018-0233-8__Mathematische Semesterberichte, vol. 66, 2019, pp. 247–249, doi:10.1007/s00591-018-0233-8.
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