@misc{indiciaeeba56052c615,
  title = {[Continuous performance control in education and instructions. 2. Programmed methods in the department of orthodontic stomatology (non-machine evaluation methods)].},
  author = {R Krämer and J Weiskopf},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4506846/},
  note = {Source identifier: 4506846}
}