• http://www.drugbank.ca/drugs/DB00620
• Bernstein, I.L., et al.: Chest, 81, 20 (1972)
• Florey, K., et al.: Anal. Profiles Drug Subs., 1, 397 (1972)
• Bernstein, S. et al., J.A.C.S., 1956, 78, 5693, (synth)
• Florey, K., Anal. Profiles Drug Subst., 1972, 1, 367; 397; 423, (rev)
• Aldrich Library of 13C and 1H FT NMR Spectra, 1992, 3, 586B, (nmr)
• Fried, J. et al., J.A.C.S., 1958, 80, 2338, (synth, pharmacol)
• Lewis, R.J., Sax's Dangerous Properties of Industrial Materials, 8th edn., Van Nostrand Reinhold, 1992, AQX250; AQY375; AQX500; AQX750
• Zbinovsky, V. et al., Anal. Profiles Drug Subst., 1977, 6, 579, (rev)
• Toft, P. et al., Can. J. Pharm. Sci., 1972, 7, 53, (ms)
• Fiegel, G., Arzneim.-Forsch., 1975, 25, 560, (rev)
• Sieh, D.H., Anal. Profiles Drug Subst., 1982, 11, 593; 615; 651, (rev)
• Negwer, M., Organic-Chemical Drugs and their Synonyms, 6th edn., Akademie-Verlag, 1987, 6222; 7100; 7152
• Martindale, The Extra Pharmacopoeia, 30th edn., Pharmaceutical Press, 1993, 739