1. Bloom, B.S., Krathwohl, D.R.: Taxonomy of Educational Objectives. Addison-Wesley, Reading (1984)
2. Boytcheva, S., Dobrev, P., Angelova, G.: CGExtract: Toward Extraction of Conceptual Graphs from Controlled English. In: Contr. ICCS-2001, pp. 89–102 (2001)
3. Lecture Notes in Artificial Intelligence;S. Boytcheva,2002
4. Lecture Notes in Artificial Intelligence;S. Boytcheva,2002
5. Boytcheva, S., Kalaydjiev, O., Strupchanska, A., Angelova, G.: Bewveen Language Correcness and Domain Answering on the World Wide Web. In: Proc. RANLP-2001, pp. 40-46 (2001)