M. Huchard, A. Napoli, M. Hacene, and P. Valtchev. Selected Contributions in Data Analysis and Classification, Studies in Classification, Data Analysis, and Knowledge Organization, (October 2007)
J. Hirth, V. Horn, G. Stumme, and T. Hanika. Graph-Based Representation and Reasoning - 28th International Conference on Conceptual Structures, ICCS 2023, Berlin, Germany, September 11-13, 2023, Proceedings, 14133, page 138--152. (2023)