Bacelar-Nicolau H. (1988): Two Probabilistic Models for Classification of Variables in Frequency Tables. In: Classification and Related Methods of Data Analysis, H.-H. Bock (ed.), North Holland: Elsevier Sciences Publishers B.V.: 181-186.
Bacelar-Nicolau H. (2000): The Affinity Coefficient. In: Analysis of Symbolic Data Exploratory Methods for Extracting Statistical Information from Complex Data, H.H. Bock, E. Diday (Eds.), Springer: 160-165.
Bacelar-Nicolau H., Nicolau F.C., Sousa A., Bacelar-Nicolau L. (2009): Measuring Similarity of Complex and Heterogeneous Data in Clustering of Large Data Sets. Biocybernetics and Biomedical Engineering 29(2): 9-18.
Bacelar-Nicolau H., Nicolau F.C., Sousa A., Bacelar-Nicolau L. (2010): Clustering Complex Heterogeneous Data Using a Probabilistic Approach. Proceedings of Stochastic Modeling Techniques and Data Analysis International Conference (SMTDA2010), Chania Crete Greece, 8-11 June 2010 - published on the CD Proceedings of SMTDA2010 (electronic publication).
Nicolau F.C., Bacelar-Nicolau H. (1998): Some Trends in the Classification of Variables. In: Data Science, Classification, and Related Methods, C. Hayashi, N. Ohsumi, K. Yajima, Y. Tanaka, H. H. Bock, Y. Baba (Eds.), Springer-Verlag: 89-98.10.1007/978-4-431-65950-1_7
Silva O., Bacelar-Nicolau H., Nicolau F.C. (2010): Global Approach for Evaluating the Quality of Clustering Results. In: Programme and Abstracts CFE 10 & ERCIM 10 (4th CSDA Intern. Conference on Computational and Financial Econometrics and 3rd Conference of the ERCIM Working Group on Computing and Statistics): 40.