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by Luders, Klaus; Oppen, Gebhard
by Staudt, Gü nter
by Matthias Bartelmann; Björn Feuerbacher; Timm Krüger; et al.
by Scheck, Florian
by Nolting, Wolfgang
by Vladimir A. Šutilov
by S. G. Michlin
by Dierck-Ekkehard Liebscher