References for Paul Epstein
- W Magnus, Vignette of a cultural episode, in Studies in numerical analysis : papers in honour of Cornelius Lanczos on the occasion of his 80th birthday (London, 1974), 7-13.
- C L Siegel, On the history of the Frankfurt Mathematics Seminar, Math. Intelligencer 1 (4) (1978/79), 223-230.
MacTutor History of Mathematics