• Di Prospero NA et al. Lancet Neurol. 2007 Oct;6(10):878-86.
• Barkworth, M.F., et al.: Arzneim.-Forsch., 35, 1704 (1985)
• Zs-Nagy, I., et al.: Arch. Gerontol. Geriatr., 11, 177 (1985)
• Kobayashi, T., et al.: J. Pharmacobio-Dyn., 8, 448 (1985)
• Okamoto, K. et al., Chem. Pharm. Bull., 1982, 30, 2797
• Naguoka, A. et al., Jpn. J. Pharmacol., 1984, 36, 291
• Martindale, The Extra Pharmacopoeia, 30th edn., Pharmaceutical Press, 1993, 1227
• Wakabayashi, H. et al., J. Chromatogr., 1992, 573, 154, (hplc)
• Bruno, V. et al., Neurosci. Lett., 1994, 178, 193, (pharmacol)
• Ger. Pat., 1975, Takeda, 2 519 730; CA, 84, 58928j, (synth)
• Naito, M. et al., Artery (Leonidas, Mich.), 1993, 20, 314, (pharmacol)
• Gillis, J.C. et al., Drugs Aging, 1994, 5, 133, (rev)
• Morimoto, H., Naturwissenschaften, 1989, 76, 200, (synth)
• Jung, Y.-S. et al., Synth. Commun., 2001, 31, 2735-2741, (synth, pmr, cmr)