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by Lieberman, Henry
by Dieter Fensel, James A. Hendler, Henry Lieberman and Wolfgang Wahlster (Eds.)
by Fensel, Dieter; Hendler, James; Lieberman, Henry; et al.
by Lieberman, Henry; Paterno, Fabio; Wulf, Volker
by Lieberman, Henry; PaternĂ², Fabio; Wulf, Volker