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by Brewka, Gerhard; Lang, Jerome
by Gerhard Brewka
by Ojeda-Aciego, Manuel; De Guzman, Inma P.; Brewka, Gerhard; et al.
by Baader, Franz; Brewka, Gerhard; Eiter, Thomas
by Baral, Chitta; Brewka, Gerhard; Schlipf, John
by Brewka, Gerhard