found: Niklas Luhmanns Systemtheorie, 1998:title page (Wilhelm Guggenberger) preliminary page (submitted this work as his doctoral thesis to Universität Innsbruck in 1996)
found: Innsbrucker Theologische Sommertage (6th : 2005). Religionen, 2006:title page (Wilhelm Guggenberger) page 169 (Dr.; born 1966 in Innsbruck)
found: Schwager, Raymund. Dogma und dramatische Geschichte, 2014:title page (Wilhelm Guggenberger)
found: Universität Innsbruck, Institut für Systematische Theologie website, viewed August 25, 2016:link to MitarbeiterInnen page (Ao. [i.e. ausserordentlicher] Univ.-Prof. Dr. Wilhelm Guggenberger; born 1966 in Innsbruck; has taught at Innsbruck since 1991; received his Promotion there in 1996 and his Habilitation in 2006) - https://www.uibk.ac.at/systheol/guggenberger/