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==References==

==References 参考文献==

{{reflist|30em}}

{{reflist|30em}}

== Further reading ==

== Further reading 拓展阅读 ==

* {{Cite Fudenberg Tirole 1991|pages=[https://books.google.com/books?id=pFPHKwXro3QC&pg=PA18 18–23]}}

* {{Cite Fudenberg Tirole 1991|pages=[https://books.google.com/books?id=pFPHKwXro3QC&pg=PA18 18–23]}}