@article{Kollosche2017,
  author    = {David Kollosche},
  title     = {Entdeckendes Lernen},
  journal   = {Journal f{\"u}r Mathematik-Didaktik},
  series    = {eine Problematisierung},
  volume    = {38},
  pages     = {209 -- 237},
  doi       = {10.1007/s13138-017-0116-x},
  year      = {2017},
}