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Jirka Hana, Alexandr Rosen, Svatava Škodová, Barbora Štindlová (2010): Error-tagged Learner Corpus of Czech. In: Proceedings of the Fourth Linguistic Annotation Workshop (LAW IV), pp. 11-19, Association for Computational Linguistics, Stroudsburg, USA, ISBN 978-1-932432-72-5 (bibtex)