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Stirzaker, David. Probability and Random Variables: A Beginner’s Guide. New York: Cambridge University Press, 1999. Web. <https://ebookcentral.proquest.com/lib/bilibrary/detail.action?docID=202358>.
Sydsæter, Knut. Further Mathematics for Economic Analysis. 2nd ed. Harlow: Financial Times/Prentice-Hall, 2008. Print.
