@inproceedings{nativelanguageidentificationusinga,
  title = {Native Language Identification Using a Mixture of Character and Word N-grams},
  author = {Elham Mohammadi and Hadi Veisi and Hessam Amini},
  year = {2017},
  booktitle = {WS 2017 9},
  url = {https://aclanthology.org/W17-5022},
}