1. J. F. Sowa, Knowledge representation: logical, philosophical and computational foundations. Pacific Grove: Brooks/Cole Publishing Co., 2000.
2. F. Harmelen, V. Lifschitz, B. Porter, Handbook of Knowledge Representation, Oxford: Elsevier, 2008.
3. S. Russell, P. Norvig, Artificial Intelligence: A Modern Approach, Third edition, Prentice Hall, 2010.
4. R. J. Brachman, H. Levesque, Knowledge representation and reasoning, The Morgan Kaufmann Series in Artificial Intelligence, Morgan Kaufmann, 2004.
5. Nodes of knowledge method for knowledge representation;Pavlić;Informatologia,2013