^Santos, P. A. G.; Figueiredo, A. C.; Lourenço, P. M. L.; Barroso, J. G.; Pedro, L. G.; Oliveira, M. M.; Schripsema, J.; Deans, S. G.; Scheffer, J. J. C. (2002). "Hairy root cultures of Anethum graveolens (Dill): Establishment, growth, time-course study of their essential oil and its comparison with parent plant oils". Biotechnology Letters. 24 (12): 1031–1036. doi:10.1023/A:1015653701265. S2CID10120732.
^IN patent 128,129, Mankombu Sambasivan Swaminathan, "Improvements in or relating to methylenedioxyphenyl derivatives", published 1970-08-21, issued 1970-10-24
^Phillips, David H.; Reddy, M. Vijayaraj; Randerath, Kurt (1984). "32P-Post-labelling analysis of DNA adducts formed in the livers of animals treated with safrole, estragole and other naturally-occurring alkenylbenzenes. II. Newborn male B6C3F1 mice". Carcinogenesis. 5 (12): 1623–1628. doi:10.1093/carcin/5.12.1623. PMID6499113.