@inproceedings{ctestcollectoraproficiencytesting,
  title = {C-Test Collector: A Proficiency Testing Application to Collect Training Data for C-Tests},
  author = {Christian Haring and Rene Lehmann and Andrea Horbach and Torsten Zesch},
  year = {2021},
  booktitle = {EACL (BEA) 2021 4},
  url = {https://aclanthology.org/2021.bea-1.19},
}