• Georgieva, M., Anal. Chim. Acta, 1978, 101, 139
• Aldrich Library of 13C and 1H FT NMR Spectra, 1992, 2, 1121C, (nmr)
• CRC Atlas of Spectral Data and Physical Constants, b848, (ir, uv)
• Weil, H. et al., Ber., 1922, 55, 2664, (synth)
• Myers, B. et al., Gut, 1987, 28, 196, (metab)
• Dobson, A.J. et al., Acta Cryst. C, 1998, 54, 1632-1634, (cryst struct)
• Lepri, L. et al., J. Chromatogr., 1974, 88, 331
• Dash, A.K. et al., Anal. Profiles Drug Subst., 1998, 25, 209-242, (rev, pharmacol)
• Drain, D.J. et al., J.C.S., 1949, 1498-1503, (N-Ac)
• Hoult, J.R.S., Drugs, 1986, 32, 18, (rev)
• Negwer, M., Organic-Chemical Drugs and their Synonyms, 6th edn., Akademie-Verlag, 1987, 8427
• Prakash, A. et al., Drugs, 1999, 57, 383-408, (rev)
• Clemett, D. et al., Drugs, 2000, 59, 929-956
• Aldrich Library of FT-IR Spectra, 1st edn., 1985, 2, 219B, (ir)
• Shavel, J. et al., J. Am. Pharm. Assoc., 1953, 42, 402; CA, 48, 9325
• Lewis, R.J., Sax's Dangerous Properties of Industrial Materials, 8th edn., Van Nostrand Reinhold, 1992, AMM500