References

Belal, T.S., E.F. Khamis, F.A. El Yazbi and M.M. Hamdy, 2014. High performance liquid chromatographic determination of the ternary mixture of caffeine, dipyrone and drotaverine hydrochloride in tablets dosage form. J. Appl. Pharm. Sci., 3: 33-39.
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Coffee Liqueur, 1962. Learn craft distilling. Drink Secrets, USA. http://www.drinksecrets.com/ingredient/coffee-liqueur--/i1141c6.

Efsa, N.D.A., 2015. Panel (EFSA Panel on Dietetic Products, Nutrition and Allergies): Scientific opinion on dietary reference values for vitamin A. Eur. Food Safety Authority J., 13: 4028-4084.

UDSA., 2013. National nutrient database for standard reference release 26. United States Department of Agriculture, Washington, DC. USA. http://web.archive.org/web/20131122090248/http://ndb.nal.usda.gov/ndb/foods/show/4290.

USDA Foreign Agricultural Service, 2015. This report contains assessments of commodity and trade issues made by USDA staff and not necessarily statements of official US. Government policy. USDA Foreign Agricultural Service, Washington, D.C., USA.