Direct Minimization of Error Rates in Multivariate Classification. - Michael C. Röhl; Claus Weihs; Winfried Theis (Comput. Stat., 2002)

Application and Use of Multivariate Control Charts in a BTA Deep Hole Drilling Process. - Amor Messaoud; Winfried Theis; Claus Weihs; Franz Hering (GfKl, 2004)

Determination of Relevant Frequencies and Modeling Varying Amplitudes of Harmonic Processes. - Winfried Theis; Claus Weihs (GfKl, 2004)

Spiralling in BTA Deep-hole Drilling: Models of Varying Frequencies. - Nils Raabe; Oliver Webber; Winfried Theis; Claus Weihs (GfKl, 2005)