Gerardo Brown-Manrique, "5 by Fränkel", The Value of Design, 97th ACSA Annual Meeting, March 26–28, 2009, Portland, Oregon, Abstract Book p. 56 (pdf)
berlin.de
stadtentwicklung.berlin.de
Gartenstadt Atlantic, Denkmale in Berlin, Senatsverwaltung für Stadtentwicklung Berlin, 25 March 2008, retrieved 5 April 2011 (in German)
books.google.com
Kunst im Exil in Grossbritannien 1933-1945: eine Ausstellung der Neuen Gesellschaft für Bildende Kunst in den Räumen der Orangerie des Schlosses Charlottenburg vom 10.1.-23.2.1986, Neue Gesellschaft für bildende Kunst, Berlin: Frölich & Kaufmann, 1986, ISBN978-3-88725-218-2, p. 170.
Gerwin Zohlen, Rudolf Fränkel, die Gartenstadt Atlantic und Berlin: eine Ausstellung im Deutschen Werkbund Berlin, Deutscher Werkbund Berlin, Sulgen: Niggli, 2006, ISBN978-3-7212-0605-0, p. 102(in German) refers to the Lichtburg as his first project. "Architekten im Exil", KIT, also dates the Lichtburg to 1924 and the complex to 1925-28. However, the cinema did not open until Christmas Day 1929.
Who's Who in Art: Biographies of leading men and women in the World of Art today--artists, designers, craftsmen, critics, writers, teachers, collectors and curators, with an appendix of signatures, 17th ed. Havant, Hampshire: Art Trade Press, 1974, ISBN978-0-900083-06-8, p. 155.
Gesellschaft zur Erforschung des Lebens und Wirkens deutschsprachiger jüdischer Architekten, Fraenkel lists Fränkel amongst the first wave of emigrants.
Scholarship/Awards, Department of Architecture + Interior Design, Miami University
romanian-scene-designers.org
"[T]he stage, as the entire Comedy Theater building, belongs to Modernism, being created in 1935 by the German architect Rudolf Frankel", Maria Miu, Roumanian Scene Designers, Ileanu Foundation, 2007, retrieved 5 April 2011.