@article{BuschhueterSpodenBorowski2017,
  author    = {David Buschh{\"u}ter and Christian Spoden and Andreas Borowski},
  title     = {Physics knowledge of first semester physics students in Germany},
  journal   = {International journal of science education},
  series    = {a comparison of 1978 and 2013 cohorts},
  volume    = {39},
  number    = {9},
  pages     = {1109 -- 1132},
  doi       = {10.1080/09500693.2017.1318457},
  year      = {2017},
}