อ้างอิง ของ แฟกทอเรียล

  1. ↑ Ronald L. Graham, Donald E. Knuth, Oren Patashnik (1988) Concrete Mathematics, Addison-Wesley, Reading MA. ISBN 0-201-14236-8, p. 111
  2. ↑ N. L. Biggs, The roots of combinatorics, Historia Math. 6 (1979) 109−136
  3. ↑ Higgins, Peter (2008), Number Story: From Counting to Cryptography, New York: Copernicus, p. 12, ISBN 978-1-84800-000-1 says Krempe though.
  4. ↑ Ramanujan, Srinivasa (1988), The lost notebook and other unpublished papers, Springer Berlin, p. 339, ISBN 354018726X
  5. ↑ Hadamard, M. J. (1894), Sur L’Expression Du Produit 1·2·3· · · · ·(n−1) Par Une Fonction Entière (PDF) (in French), OEuvres de Jacques Hadamard, Centre National de la Recherche Scientifiques, Paris, 1968 Italic or bold markup not allowed in: |publisher= (help)CS1 maint: unrecognized language (link)
  6. ↑ Peter Luschny, Hadamard versus Euler - Who found the better Gamma function?.