Modern Christianity. The German Reformation. (Schaff's History of the Christian Church Vol VII)
- The complete text of the book by Philip Schaff.
- http://www.ccel.org/ccel/schaff/hcc7.toc.html

Catholic Encyclopedia: St. Henry II
- Biography of the German king and Holy Roman Emperor, d. 1024.
- http://www.newadvent.org/cathen/07227a.htm

Bruno, Saint, c.1030-1101, German monk, founder of the Carthusians
- Brief biographical entry in the Columbia Encyclopedia.
- http://www.bartleby.com/65/br/BrunoSt1030.html

Henry II, Holy Roman emperor and German king
- Biographical article in the Columbia Encyclopedia, 6th ed.
- http://www.bartleby.com/65/he/Henry2HRE.html

Early Lutheran Hymn Writers
- Biographical sketches of Philipp Nicolai, Johann Heermann, Paul (Paulus) Gerhardt, and Calvinist near-contemporary Joachim Neander.
- http://elvis.rowan.edu/~kilroy/JEK/10/24.html

Open Door Mission Church
- Bible literature, e-zine, links, beliefs and general information.
- http://www.odmchurch.de