References
- Ietswaart , J. H. 1980 . A Taxonomic Revision of the Genus Origanum (Labiatae). , The Hague/Boston/London : Leiden University Press .
- Chalchat , J. C. and Pasquier , B. 1998 . Morphological and chemical studies of origanum clones: Origanum vulgare L. ssp. vulgare. . J. Essent. Oil Res. , 10 : 119 – 125 .
- Sezik , E. , Tümen , G. , Kirimer , N. , Özek , T. and Baser , K. H. C. 1993 . Essential oil composition of four Origanum vulgare subspecies of Anatolian origin. . J. Essent. Oil Res. , 5 : 425 – 431 .
- Calzolari , C. , Stancher , B. and Pertoldi Marletta , G. 1968 . Origanum oils and their investigation by Gas-Chromatographic and Infrared Spectroscopic analysis. . Analyst , 93 : 311 – 318 .
- Melegari , M. , Severi , F. , Bertoldi , M. , Benvenuti , S. , Circetta , G. , Morone Fortunato , I. , Bianchi , A. , Leto , C. and Carrubba , A. 1995 . Chemical characterisation of essential oils of some Origanum vulgare L. sub-species of various origin. . Rivista Ital. EPPOS , 16 : 21 – 28 .