Björk, Tomas. "Change of Numeraire." Arbitrage Theory in Continuous Time. : Oxford University Press, 1998-09-24. Oxford Scholarship Online. 2003-11-01. Date Accessed 24 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0198775180.001.0001/acprof-9780198775188-chapter-19>.
Björk, T.(1998-09-24). Change of Numeraire. In Arbitrage Theory in Continuous Time. : Oxford University Press. Retrieved 24 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0198775180.001.0001/acprof-9780198775188-chapter-19.
Björk, Tomas. "Change of Numeraire." In Arbitrage Theory in Continuous Time. : Oxford University Press, 1998-09-24. http://www.oxfordscholarship.com/view/10.1093/0198775180.001.0001/acprof-9780198775188-chapter-19.
Björk T. Change of Numeraire. In: Björk T. Arbitrage Theory in Continuous Time. Oxford University Press; 1998. http://www.oxfordscholarship.com/view/10.1093/0198775180.001.0001/acprof-9780198775188-chapter-19. Accessed May 24, 2013.