Tschepego Valentin, Sprachgewalt – Johannes Scherr, ein bürgerlicher Demokrat (https://syndikalismusforschungvt.wordpress.com/2011/08/15/sprachgewalt-johannes-scherr-ein-burgerlicher-demokrat). [Tschepego, Johannes Scherr online]

The Peerage, A genealogical survey of the peerage of Britain as well as the royal families of Europe (http://www.thepeerage.com). [The Peerage online]