found: Die Messreform Martin Luthers und der Eucharistie der alten Kirche, 1989:title page (Reinhard Messner) preface (submitted this work as his doctoral thesis to the Universität Graz in 1987)
found: Haec sacrosancta synodus, 2006:title page (Reinhard Messner) back cover (Dr. theol.; born 1960; professor of liturgics at the University of Innsbruck)
found: Wissenschaft der Liturgie. Band 1, Begriffe, Geschichte, Konzepte, 2022:t.p. (Reinhard Messner)
found: Universität Innsbruck, Institut für Bibelwissenschaften und Historische Theologie website, viewed January 12, 2023:link to Personen page (O. Univ.-Prof. Reinhard Messner; born June 24, 1960, in Judenburg; obtained his doctorate at Graz in 1987; ordained to the Catholic priesthood in 1988; he was appointed professor of liturgics at Innsbruck in 1996; co-editor of Haec sacrosancta synodus) - https://www.uibk.ac.at/bibhist/messner/index.html.de
found: Deutsche Nationalbibliothek online catalog, viewed January 12, 2023(authorized access point: Messner, Reinhard; other data in authority record: Austrian theologian and university professor; born 1960 in Judenburg; active in Innsbruck)