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by Vöcking, Berthold; Alt, Helmut; Dietzfelbinger, Martin; et al.
by Alt, Helmut
by Albers, Susanne; Alt, Helmut; N?er, Stefan
by Vocking, Berthold; Alt, Helmut; Dietzfelbinger, Martin; et al.
by Alt, Eckhard; Klein, Helmut; Griffin, Jerry C.
by Berthold Vocking; Helmut Alt; Martin Dietzfelbinger