@Inproceedings{seese2004doresimp, author = "Detlef Seese and Frank Schlottmann", booktitle = "Innovations in Classification, Data Science, and Information Systems. Proc. 27th. Annual GfKI Conference, University of cottbus, March 12 - 14, 2003", editor = "D. Baier, K. Wernecke", pages = "506 - 514", publisher = "Springer-Verlag, Heidelberg", title = "Discovery of risk-return efficient structures in middle-market portfolios", year = "2004", }