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
Anthony Trollope (2016). “Anthony Trollope: The Chronicles of Barsetshire & The Palliser Novels (Unabridged): The Warden + The Barchester Towers + Doctor Thorne + Framley Parsonage + The Small House at Allington + The Last Chronicle of Barset + Can You Forgive Her? + The Prime Minister + Eustace Diamonds...”, p.58, e-artnow (Open Publishing)
"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.