@inbook{44684,
  author       = {{Vollstedt, Maike and Rezat, Sebastian}},
  booktitle    = {{Compendium for Early Career Researchers in Mathematics Education}},
  editor       = {{Kaiser, Gabriele and Presmeg, Norma}},
  isbn         = {{9783030156350}},
  issn         = {{2520-8322}},
  publisher    = {{Springer International Publishing}},
  title        = {{{An Introduction to Grounded Theory with a Special Focus on Axial Coding and the Coding Paradigm}}},
  doi          = {{10.1007/978-3-030-15636-7_4}},
  year         = {{2019}},
}

@inbook{56245,
  author       = {{Biehler, Rolf}},
  booktitle    = {{ICME-13 Monographs}},
  editor       = {{Jahnke, H. N. and Hefendehl-Hebeker, L.}},
  isbn         = {{9783030110680}},
  issn         = {{2520-8322}},
  publisher    = {{Springer International Publishing}},
  title        = {{{Allgemeinbildung, Mathematical Literacy, and Competence Orientation}}},
  doi          = {{10.1007/978-3-030-11069-7_6}},
  year         = {{2019}},
}

@inbook{44686,
  author       = {{Rezat, Sebastian and Visnovska, Jana and Trouche, Luc and Qi, Chunxia and Fan, Lianghuo}},
  booktitle    = {{Research on Mathematics Textbooks and Teachers’ Resources: Advances and Issues}},
  editor       = {{Fan, Lianghuo and Trouche, Luc and Qi, Chunxia and Rezat, Sebastian and Visnovska, Jana}},
  isbn         = {{9783319732527}},
  issn         = {{2520-8322}},
  publisher    = {{Springer}},
  title        = {{{Present Research on Mathematics Textbooks and Teachers’ Resources in ICME-13: Conclusion and Perspectives}}},
  doi          = {{10.1007/978-3-319-73253-4_16}},
  year         = {{2018}},
}