↑ Wolfgang Trapp: Kleines Handbuch der Münzkunde und des Geldwesens in Deutschland, p. 98.
参考文献
Clive Parry (ed), Consolidated Treaty Series (Dobbs Ferry, NY: Oceana, 1969) vol. 87, p. 51 (text of treaty in German and English)
John C. Edmunds and John E. Marthinsen, Wealth by Association: Global Prosperity Through Market Unification (Westport, Conn.: Greenwood, 2003) pp. 98–99.
William Arthur Shaw, A History of Currency, 1252 to 1896 (New York: Augustus M. Kelley, 1967).
Wolfgang Trapp: Kleines Handbuch der Münzkunde und des Geldwesens in Deutschland. Reclam Verlag Stuttgart 1999, ISBN 3-15-018026-0, p. 98.