Combining Manual and Automatic Annotation of a Learner Corpus. In: Text, Speech and Dialogue: 15th International Conference, TSD 2012. Proceedings, Lecture Notes in Computer Science, ISSN 0302-9743, 7499, pp. 127-134, Springer Verlag, Berlin / Heidelberg, ISBN 978-3-642-32789-6 (url, bibtex)