The Classification of Candlestick Charts: Laying the Foundation for Further Empirical Research. - Stefan Etschberger; Henning Fock; Christian Klein 003; Bernhard Zwergel (GfKl, 2005)

A Sequential Model for Global Spam-Classifying Processes. - Wolfgang R. Burkart; Stefan Etschberger; Christian Klein 003; Dennis Kundisch (ICIS, 2010)