1. b. Healthcare Solutions, Healthcare Solutions (online), October 18, 2004.http://www.rxlist.com/top200a.htm.
2. M.K. Angier, R.J. Lewis, A.K. Chaturvedi, D.V. Canfield, Gas chromatographic/mass spectrometric differentiation of atenolol, metoprolol, propranolol, and an interfering metabolite product of metoprolol, Technical Report no. DOT/FAA/AM-04/15, U.S. Department of Transportation, Federal Aviation Administration, Office of Aerospace Medicine, Washington, DC, 2004.
3. Use of cyclic boronates for GC/MS screening and quantitation of beta-adrenergic blockers and some bronchodilators;Zamecnik;J. Anal. Toxicol.,1990
4. Screening confirmatory analysis of beta-agonists, beta-antagonists and their metabolites in horse urine by capillary gas chromatography-mass spectrometry;Dumasia;J. Chromatogr.,1991
5. Simultaneous determination of propranolol or metoprolol in the presence of butyrophenones in human plasma by gas chromatography with mass spectrometry;Quaglio;J. Pharm. Sci.,1993