C. Olaru, Contributions to Automatic Learning: Soft Decision Tree Induction, Ph. D. Thesis, September 2003, University of Liege.

C. Olaru, A complete fuzzy decision tree technique, Fuzzy Sets and Systems, 138 (2003) 221-254 (and its erratum).

P. Geurts, C. Olaru and L. Wehenkel, Improving the bias/variance tradeoff of decision trees: towards soft tree induction, Engineering Intelligent Systems, Vol. 9, no. 4, pages 195-204, December 2001.

C. Olaru and L. Wehenkel, On Neurofuzzy and Fuzzy Decision Tree Approaches, in Information, Uncertainty and Fusion, edited by Bernadette Bouchon-Meunier, Ronald R. Yager and Lotfi A. Zadeh, Boston, Kluwer Academic Publishers, 2000, pages 131-145.

C. Olaru and L. Wehenkel, Data Mining, in IEEE Computer Applications in Power, Vol. 12, no. 3, July 1999, pages 19-25.

C. Olaru, P. Geurts and L. Wehenkel, Data Mining Tools and Applications in Power System Engineering, in Proc. of 13th Power Systems Computation Conference, Vol. 1, pages 324-330, June 28 - July 2nd 1999, Trondheim, Norway.

C. Olaru, Fuzzy Decision Tree Induction using Square Error Type of Criterion, Technical Internal Report, University of Liege, Belgium, October 1998.

C. Olaru, Regression trees. Application to power systems security assessment, Technical Internal Report, University of Liege, Belgium, September 1997.