« I was good at discovering perhaps difficult and interesting special cases and Richard was good at generalising them and putting them in their proper perspective. »(en) P. Erdős, « My joint work with Richard Rado », dans C. Whitehead, Surveys in combinatorics, 1987: Invited Papers for the Eleventh British Combinatorial Conference, CUP, coll. « London Mathematical Society Lecture Note Series » (no 123), (ISBN978-0-521-34805-8, lire en ligne), p. 53-80
