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@book{Sierau.2025,
 author = {Sierau, Jakob and Scholz, Luise A. and Beese, Christin and Jusufi, Donieta and Lott, Martje and Schwippert, Knut},
 year = {2025},
 title = {{TIMSS 2023. Skalenhandbuch zur Dokumentation der Erhebungsinstrumente und Arbeit mit den Datensätzen}},
 url = {https://www.pedocs.de/volltexte/2025/34132/pdf/Sierau_et_al_2025_TIMSS_2023_Skalenhandbuch.pdf},
 address = {Münster},
 urldate = {29.06.2026},
 publisher = {{Waxmann Verlag GmbH}},
 isbn = {9783818800703},
 doi = {10.31244/9783818850708}
}


@book{Schwippert.2024,
 author = {Schwippert, Knut and Kasper, Daniel and Eickelmann, Birgit and Goldhammer, Frank and Köller, Olaf and Selter, Christoph and Steffensky, Mirjam},
 year = {2024},
 title = {{TIMSS 2023. Mathematische und naturwissenschaftliche Kompetenzen von Grundschulkindern in Deutschland im internationalen Vergleich}},
 url = {https://www.waxmann.com/buecher/TIMSS-2023},
 address = {Münster},
 urldate = {29.06.2026},
 publisher = {{Waxmann Verlag GmbH}},
 isbn = {9783830949596},
 doi = {10.31244/9783830999591}
}