1. Martindale. The Complete Drug Reference, ed. S. C. Sweetman, Pharmaceutical Press, London, 33rd edn, 2002, p. 768
2. M. J.
O'Neil
, A.Smith, P. E.Heckelman and S.Budavari, Merck index, John Wiley and Sons, 13th edn, 2001, pp. 166–167
3. The British Pharmacopoeia, Stationary Office Books, London, 3rd edn, 2001, vol. 1, pp. 211–212
4. Development and validation of HPLC methods for the enantioselective analysis of bambuterol and albuterol