1. The Boeing Company: Boeing Simplified English Checker. (2001),
http://www.boeing.com/assocproducts/sechecker/
2. Lecture Notes in Computer Science;R.N. Shiffman,2010
3. Lecture Notes in Computer Science;G. Hart,2008
4. Lecture Notes in Computer Science;N.E. Fuchs,2008
5. Dean, M., Schreiber, G.: OWL Web Ontology Language Reference (2004),
http://www.w3.org/TR/owl-ref/