P. Kluegl, M. Toepfer, F. Lemmerich, A. Hotho, and F. Puppe. Proceedings of 1st International Conference on Pattern Recognition Applications and Methods (ICPRAM), page 240-248. Vilamoura, Algarve, Portugal, SciTePress, (6-8 February 2012)
P. Kluegl, M. Atzmueller, and F. Puppe. Proceedings of the Biennial GSCL Conference 2009, 2nd UIMA@GSCL Workshop, page 233-240. Gunter Narr Verlag, (2009)
S. Huffman. Connectionist, Statistical, And Symbol Approaches to Learning for
Natural Language Processing, volume 1040, page 246-260. Springer, (1996)