Archibald, J. L.; Alps, B. J.; Cavalla, J. F.; Jackson, J. L. (1971). “Synthesis and hypotensive activity of benzamidopiperidylethylindoles”. Journal of Medicinal Chemistry. 14 (11): 1054. doi:10.1021/jm00293a009. PMID5115203.
Archibald, J. L.; Alps, B. J.; Cavalla, J. F.; Jackson, J. L. (1971). “Synthesis and hypotensive activity of benzamidopiperidylethylindoles”. Journal of Medicinal Chemistry. 14 (11): 1054. doi:10.1021/jm00293a009. PMID5115203.