G. Herzog, H. Kirchmann, S. Merten, A. Ndiaye, and P. Poller. Proceedings of the HLT-NAACL 2003 Workshop on Software Engineering and Architecture of Language Technology Systems (SEALTS), Edmonton, Canada, page 75-82. (2003)
H. van Heerde. Centre for Telematics and Information Technology, University of Twente, Enschede, The Netherlands, (June 2010)CTIT Ph.D. thesis series no. 10-166.