原文:「If you already know what recursion is, just remember the answer. Otherwise, find someone who is standing closer to Douglas Hofstadter than you are; then ask him or her what recursion is.」
書目
Johnsonbaugh, Richard. Discrete Mathematics. Prentice Hall. 2004. ISBN 0-13-117686-2.
Hofstadter, Douglas. Gödel, Escher, Bach: an Eternal Golden Braid. Basic Books. 1999. ISBN 0-465-02656-7.
Shoenfield, Joseph R. Recursion Theory. A K Peters Ltd. 2000. ISBN 1-56881-149-7.
Cori, Rene; Lascar, Daniel; Pelletier, Donald H. Recursion Theory, Godel's Theorems, Set Theory, Model Theory. Oxford University Press. 2001. ISBN 0-19-850050-5.
Barwise, Jon; Moss, Lawrence S. Vicious Circles. Stanford Univ Center for the Study of Language and Information. 1996. ISBN 0-19-850050-5. - offers a treatment of corecursion.
Rosen, Kenneth H. Discrete Mathematics and Its Applications. McGraw-Hill College. 2002. ISBN 0-07-293033-0.
Cormen, Thomas H., Charles E. Leiserson, Ronald L. Rivest, Clifford Stein. Introduction to Algorithms. Mit Pr. 2001. ISBN 0-262-03293-7.
Kernighan, B.; Ritchie, D. The C programming Language. Prentice Hall. 1988. ISBN 0-13-110362-8.
Stokey, Nancy,; Robert Lucas; Edward Prescott. Recursive Methods in Economic Dynamics. Harvard University Press. 1989. ISBN 0674750969.