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Díaz-Maroto, M. C; Díaz-Maroto Hidalgo, I. J; Sánchez-Palomo, E; Pérez-Coello, M. S (2005). "Volatile components and key odorants of fennel (Foeniculum vulgare Mill.) and thyme (Thymus vulgaris L.) oil extracts obtained by simultaneous distillation-extraction and supercritical fluid extraction". Journal of Agricultural and Food Chemistry53 (13): 5385–9. doi:10.1021/jf050340+. PMID15969523.
Uusitalo, L; Salmenhaara, M; Isoniemi, M; Garcia-Alvarez, A; Serra-Majem, L; Ribas-Barba, L; Finglas, P; Plumb, J et al. (2016). "Intake of selected bioactive compounds from plant food supplements containing fennel (Foeniculum vulgare) among Finnish consumers". Food Chemistry194: 619–25. doi:10.1016/j.foodchem.2015.08.057. PMID26471600.