=参考文献=
* L. Valiant. [http://www.probablyapproximatelycorrect.com/ ''Probably Approximately Correct.''] Basic Books, 2013. In which Valiant argues that PAC learning describes how organisms evolve and learn.
* L. Valiant. [http://web.mit.edu/6.435/www/Valiant84.pdf A theory of the learnable]. Communications of the ACM, 27, 1984.