@inproceedings{ai-2013-perceptual,
    title = "Perceptual Feedback in Computer Assisted Pronunciation Training: A Survey",
    author = "Ai, Renlong",
    editor = "Temnikova, Irina  and
      Nikolova, Ivelina  and
      Konstantinova, Natalia",
    booktitle = "Proceedings of the Student Research Workshop associated with {RANLP} 2013",
    month = sep,
    year = "2013",
    address = "Hissar, Bulgaria",
    publisher = "INCOMA Ltd. Shoumen, BULGARIA",
    url = "https://aclanthology.org/R13-2001/",
    pages = "1--6"
}