Dawn and Decline
- Excerpt from this work by Horkheimer, presenting the analogy between the working man and the circus elephant.
- http://www.primitivism.com/dawn-decline.htm

Eclipse of Reason
- Brief summary of this key 1946 work by Horkheimer.
- http://home.cwru.edu/~ngb2/Authors/Horkheimer.html

Horkheimer, Max (1895-1973)
- Article by Lloyd Spencer from the Icon Dictionary of Postmodern Thought.
- http://www.tasc.ac.uk/depart/media/staff/ls/Modules/Theory/Horkheimer.htm

Max Horkheimer and the Philosophy of Education
- Article by Ilan Gur-Ze'ev from the Encyclopaedia of Philosophy of Education. Explores the development of Horkheimer's thought.
- http://www.vusst.hr/ENCYCLOPAEDIA/horkheimer.htm

Horkheimer-Pollock-Archiv
- Archive located in Frankfurt am Main, Germany, housing the manuscripts of Max Horkheimer and Friedrich Pollock. Site includes catalogue of holdings and a biography of Horkheimer.
- http://www.stub.uni-frankfurt.de/archive/ehork.htm