1. Debuigne, G. 1984.Larousse des plantes qui guerissent., 254Paris: Edit. Larousse.
2. Quezel, P. and Santa, S. 1962.Nouvelle flore de l'Algerie et des regions desertiques meridionales., Edn. 1&2, 1170Paris: CNRS.
3. Swahn, J. O. 1993.Les Epices., 208Paris: Edit. Grund.
4. Origanum oils and their investigation by gas-chromatographic and infrared spectroscopic analysis