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by De Cillia, Rudolf; Gruber, Helmut; Spitzmuller, Jurgen
by Gruber, Helmut; Graves, Pamela M.
by Gruber, Helmut; Redeker, Gisela
by Gruber, Helmut
by Gruber, Helmut; Kaltenbacher, M.; Muntigl, Peter
by Gruber, Hans; Harteis, Christian; Heid, Helmut; et al.
by Gruber, Helmut; Huemer, Birgit; Rheindorf, Markus
by Hans Gruber; Christian Harteis; Helmut Heid