Hans-Martin Schenke 
Papyrus Michigan 3520 und 6868(a) [PDF ebook] 
Ecclesiastes, Erster Johannesbrief und Zweiter Petrusbrief im fayumischen Dialekt

Until his retirement in 1994, Prof. Emeritus Dr. Dr. Hans Schenke taught New Testament Studies at the Humboldt University of Berlin and founded the Berlin Working Group of Coptic Gnostic Writing more than 30 years ago. He died in 2002.
Since his retirement in 1998, Dr. Rodolphe Kasser has been actively engaged as Honorary Professor of Coptic Language and Literature at the University of Geneva, and has edited numerous Coptic and Greek manuscripts (primarily from the Bodmer Collection).