Centralization: a new method for the normalization of gene expression data. - Alexander Zien; Thomas Aigner; Ralf Zimmer; Thomas Lengauer (ISMB (Supplement of Bioinformatics), 2001)

Data Processing Effects on the Interpretation of Microarray Gene Expression Experiments. - Katrin Fundel; Robert Küffner; Thomas Aigner; Ralf Zimmer (German Conference on Bioinformatics, 2005)