---
res:
  bibo_doi: 10.17619/UNIPB/1-768
  dct_date: 2019^xs_gYear
  dct_language: eng
  dct_publisher: Universitätsbibliothek Paderborn@
  dct_title: 'Proceedings of the Third International Conference on Mathematics Textbook
    Research and Development: 16-19 September 2019 Paderborn, Germany@'
...