1. T. Debevoise, R. Geneva, The Microguide to Process Modeling in BPMN 2.0, 2 edn. (Advanced Component Research, Lexington, 2008)
2. R. Wille, Conceptual Graphs and Formal Concept Analysis. (Technische Hochschule Darmstadt, Fachbereich Mathematik, 1997)
3. D. McComb, Semantics in Business Systems: The Savvy Managers Guide (US, Elsevier, San Francisco, 2004)
4. B. Ganter, R. Wille, Formal Concept Analysis: Mathematical Foundations. (Springer, Berlin, 1998) (Translated by C, Franzke, 1998)
5. K. Devlin, Goodbye Descartes—The End of Logic and the Search for a New Cosmology of the Mind. (Wiley, NY, 1997)