R. Jäschke, A. Hotho, C. Schmitz, B. Ganter, и G. Stumme. Proceedings of the 6th IEEE International Conference on Data Mining (ICDM 06), стр. 907-911. Hong Kong, IEEE Computer Society, (декабря 2006)
G. Stumme. Ordinal and Symbolic Data Analysis. Proc. OSDA'95. Studies in Classification, Data Analysis, and Knowledge Organization 8, стр. 31-44. Heidelberg, Springer, (1996)
G. Stumme. Data Analysis and Information Systems. Statistical and Conceptual approaches. Proc. GfKl'95. Studies in Classification, Data Analysis, and Knowledge Organization 7, стр. 457-469. Heidelberg, Springer, (1996)
G. Stumme. Ordinal and Symbolic Data Analysis. Proc. OSDA'95. Studies in Classification, Data Analysis, and Knowledge Organization 8, стр. 31-44. Heidelberg, Springer, (1996)
G. Stumme. Data Analysis and Information Systems. Statistical and Conceptual approaches. Proc. GfKl'95. Studies in Classification, Data Analysis, and Knowledge Organization 7, стр. 457-469. Heidelberg, Springer, (1996)