1. Lászlo Babai, In and out of Hungary: Paul Erdős, his friends, and times, Combinatorics, Paul Erdős is eighty, Vol. 2 (Keszthely, 1993), pp. 7–95, Bolyai Soc. Math. Stud., 2, János Bolyai Math. Soc., Budapest, 1996, MR1395855.
2. George Paul Csicsery, N is a number, a portrait of Paul Erdős, 57-min. documentary film, Zala Films, 1993, MR1660995.
3. The DBLP Computer Science Bibliography website,
http://www.informatik.uni-trier.de/~ley/db/
.
4. Rodrigo De Castro and Jerrold W. Grossman, Famous trails to Paul Erdős, Math. Intelligencer
21, no. 3 (Summer 1999), 51–63, MR1709679. (An expanded Spanish-language version of this article appeared in Rev. Acad. Colombiana Cienc. Exact. Fís. Natur. 23 (1999) no. 89, 563–582, MR1744115).
5. Paul Erdős, On the fundamental problem of mathematics, Amer. Math. Monthly
79 (1972), 149–150.