@inproceedings{hussein-etal-2012-real,
    title = "Real-Time Tone Recognition in A Computer-Assisted Language Learning System for {G}erman Learners of {M}andarin",
    author = {Hussein, Hussein  and
      Mixdorff, Hansj{\"o}rg  and
      Hoffmann, R{\"u}diger},
    editor = "Mamidi, Radhika  and
      Prahallad, Kishore",
    booktitle = "Proceedings of the Workshop on Speech and Language Processing Tools in Education",
    month = dec,
    year = "2012",
    address = "Mumbai, India",
    publisher = "The COLING 2012 Organizing Committee",
    url = "https://aclanthology.org/W12-5805/",
    pages = "37--42"
}