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 ===延伸阅读===
-* [https://web.archive.org/web/20080913145914/http://projecteuclid.org/DPubS?service=UI&version=1.0&verb=Display&handle=euclid.ss%2F1177012493 Thomas S. Ferguson. "Who solved the secretary problem?", Stat. Sci. vol. 4, 282–296, (1989).]
+* [http://projecteuclid.org/DPubS?service=UI&version=1.0&verb=Display&handle=euclid.ss%2F1177012493 Thomas S. Ferguson. "Who solved the secretary problem?", Stat. Sci. vol. 4, 282–296, (1989).]
-* [https://web.archive.org/web/20120226140702/http://www.bramdejonge.nl/pdf/stoppingtimes.pdf An introduction to stopping times.]
+* [http://www.bramdejonge.nl/pdf/stoppingtimes.pdf An introduction to stopping times.]
 * F. Thomas Bruss, "Sum the odds to one and stop", Annals of Probability, Vol. 4, 1384–1391,(2000)