1. Bock, H.-H. (2001), Clustering algorithms and kohonen maps for symbolic data, in ‘ICNCB Proceedings’, Osaka, pp. 203–215.
2. Studies in classification, data analysis and knowledge organisation,2000
3. Celeux, G., Diday, E., Govaert, G., Lechevallier, Y. & Ralambondrainy, H. (1989), Classification automatique des donnes, Dunod.
4. Chavent, M. (2004), An hausdorff distance between hyper-rectangles for clustering interval data, in D. Banks, L. House, F. McMorris, P. Arabie & W. Gaul, eds, ‘Classification, Clustering, and Data Mining applications’, Springer Verlag, pp. 333–339.
5. Chavent, M., De Carvalho, F. A. T., Lechevallier, Y. & Verde, R. (2003), ‘Trois nouvelles méthodes de classification automatique de données symboliques de type intervalle’, Rev. Stat. Appliquées
LI(4), 5–29.