1. On the biological properties of fragrance compounds and essential oils
2. 2. Tutin TG, Heywood VH, Burges NA, Moore DM, Valentine DH, Walters SM, Webb DA:Flora Europea, Vol. 3. Cambridge University Press, London, 1972, pp. 166–167.
3. 4. Font Quer P:Plantes Medicinales. El Dioscòrides Renovado, Ed. Labor, Barcelona, 1979, p. 691.
4. 5. Johnson T:CRC Ethnobotany Desk Reference. CRC Press, Boca Raton, FL, 1999, p. 137.