1. Alan Guttmacher Institute. State policies in brief: emergency contraception, as of December 1, 2006. Available at: http://www.guttmacher.org/statecenter/spibs/spib_EC.pdf. Accessed December 1, 2006.
2. Kaiser Family Foundation. SELF Magazine. National survey of women about their sexual health. Available at: http://www.kff.org/womenshealth/3341-index.cfm. Accessed September 21, 2005.
3. Emergency contraception in California: findings from a 2003 Kaiser Family Foundation survey;Salganicoff,2004
4. Direct access to emergency contraception through pharmacies and effect on unintended pregnancy and STIs: a randomized controlled trial;Raine;JAMA,2005
5. Advance supply of emergency contraception: effect on use and usual contraception—a randomized trial;Jackson;Obstet Gynecol,2003