Facts & Comparison. Facts & Comparisons Web Site. http://online.factsandcomparisons.com/MonoDisp.aspx?monoID=fandc-hcp11478&quick=537423%7c5&search=537423%7c5&isstemmed=True&NDCmapping=-1&fromTop=true#firstMatch. Accessed August 22, 2016.
Cardene SR [package insert]. EKR Therapeutics, Inc., Bedminster, NJ; June 2010. http://www.iodine.com/drug/cardene/fda-package-insert. Accessed August 22, 2016.