1. W. Abramowicz, M. Kowalkiewicz, P. Zawadzki “Corporate knowledge vs. Knowledge within corporation”, Publication for Network Learning Conference in Berlin, 2002
2. Angehrn, T. Nabeth, C. Roda, “Towards personalised, socially aware and active e-learning systems”, Centre for Advanced Learning Technologies (CALT), November 2001
3. International Organization for Standardization, ISO/IEC 13250, “Information technology — SGML Applications — Topic Maps”, Geneva, 2000
4. R. Ksiezyk “Answer is just a question [of matching Topic Maps]”, proc. XML Europe Conference, Paris, 2000
5. S. Pepper “The TAO of Topic Maps, finding the way in the age of infoglut”, proc. XML Europe Conference, Paris, 2000