[jointly with Frank Berger and Christian Stoess] Peter Berghaus, in: Numismatisches Nachrichtenblatt 58 (2009) 11, pp. 455sq.
www.hendrik.maekeler.eu
[jointly with Frank Berger and Christian Stoess] Peter Berghaus, in: Numismatisches Nachrichtenblatt 58 (2009) 11, pp. 455sq.