Assistant professor of history Karin Breuer has published an essay, "Arnold Ruge: Radicalism in a Reactionary Society," in Modern Europe: 1750 to the Present. (Cora Granata and Cheryl A. Koos, editors. Rowman and Littlefield, 2007: 15-30.)
https://www.ithaca.edu/intercom/article.php/20080124075539561