@article{BernhardBramannKuehberger2019,
  author    = {Roland Bernhard and Christoph Bramann and Christoph K{\"u}hberger},
  title     = {Mixed methods and triangulation in history education research: Introduction},
  journal   = {History education research journal},
  volume    = {16},
  number    = {1},
  pages     = {1 -- 4},
  doi       = {10.18546/HERJ.16.1.01},
  year      = {2019},
}