Helmut Friedel, Tina Dickey, Hans Hofmann, Städtische Galerie im Lenbachhaus München (1998). “Hans Hofmann: Wunder Des Rhythmus und Schönheit Des Raumes : [exhibition at the Städtische Galerie Im Lenbachaus in Munich, from 23 April to 29 June 1997, Schirn Kunsthalle, Frankfurt, from 12 September to 2 November 1997 ]”, p.97, Hudson Hills
"Reasoned Proposal to the Central Committee of the League for Peace and Freedom" also known as "Federalism, Socialism, Anti-Theologism" by Mikhail Bakunin, September 1867.
Arthur Penrhyn Stanley (1872). “The National Thanksgiving: Sermons Preached in Westminster Abbey: 1. Death and Life, December 10,1871; 2. The Trumpet of Patmos, December 17, 1871; 3. The Day of Thanksgiving, March 3, 1872”, p.15