@inproceedings{chen-2013-applying, title = "Applying Unsupervised Learning To Support Vector Space Model Based Speaking Assessment", author = "Chen, Lei", editor = "Tetreault, Joel and Burstein, Jill and Leacock, Claudia", booktitle = "Proceedings of the Eighth Workshop on Innovative Use of {NLP} for Building Educational Applications", month = jun, year = "2013", address = "Atlanta, Georgia", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/fix-sig-urls/W13-1707/", pages = "58--62" }