@inproceedings{sagae-etal-2010-validation, title = "Validation of a Dialog System for Language Learners", author = "Sagae, Alicia and Johnson, W. Lewis and Bodnar, Stephen", editor = "Katagiri, Yasuhiro and Nakano, Mikio", booktitle = "Proceedings of the {SIGDIAL} 2010 Conference", month = sep, year = "2010", address = "Tokyo, Japan", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/fix-sig-urls/W10-4344/", pages = "241--244" }