1. Indian Pharmacopoeia, Government of India, Ministry of Health and Family Welfare, Controller of Publications, Delhi, 1996, pp. 72–73
2. British Pharmacopoeia, Vol. I, The stationary office, London, 2005, pp. 179–181
3. United States Pharmacopeia, 28th edn, The United States Pharmacopeial Convention, Rockville, MD, 2005, p. 193
4. Simultaneous UV-spectrophotometric method for the estimation of atenolol and amlodipine besylate in combined dosage form