• Double Cola - makers of Ski
• Official Ski Website - MySkiSoda
  
• Ski Soda - Wikipedia
• Bevnet- Ski Reviews
• Excel Bottling Company
• http://thesodafizz.com/ 
• State by State SKI availability

"Double-Cola Co.-USA -- Company History". Funding Universe.com (2003).

Fred Sauceman. "Ski: Lake weekend led to soft drink’s name". GoTriCities.

Joyce M. Wolburg (2003). "Double-Cola and Antitrust Issues: Staying Alive in the Soft Drink Wars." (html). Journal of Consumer Affairs 37, http://www.questia.com/googleScholar.qst;jsessionid=LvTPYbzYghnjc2SD9XzLpFwF5TlJ213QPBVTW6G7Rxf2QHkS70Jp!-16014412?docId=5002580357.  

Jeffrey Covell (1999). "Double-Cola Co.-USA" (html). International Directory of Company Histories, Volume 70 1-5. Findarticles.com.

SKI in Evansville, IN:  http://www.courierpress.com/news/2008/feb/29/pop-art/

http://www.answers.com/topic/double-cola