found: The Crosby-Schøyen codex, 1990:title page (Hans-Gebhard Bethge [contributor])
found: Der Brief des Petrus an Philippus : ein neutestamentliches Apokryphon aus dem Fund von Nag Hammadi (NHC VIII,2), 1997:title page (herausgegeben, übersetzt und kommentiert von Hans-Gebhard Bethge)
found: German Wikipedia, viewed October 23, 2019(Hans-Gebhard Bethge; born May 23, 1943, in Berlin; German Protestant theologian; research area: Coptic Gnostic literature and Coptic Bible fragments; obtained his Dr. theol. degree in 1975; taught at the Humboldt-Universität from 1992 until his retirement in 2008)