@techreport{itb3076,
  author = {Bruns, F. W. and Müller, D.},
  title = {Lernförderliche Übergänge zwischen gegenständlichen und abstrakten Modellen technischer Systeme},
  year = {1996},
  series = {artec-papers},
  number = {43},
  publisher = {Universität Bremen},
  address = {Bremen},
  doi = {10.26092/elib/1037},
  language = {de},
}