K. A.  Youdim, DamienDorman, H. J., and Deans, S. G., ?The antioxidant effectiveness of thyme oil, ?-tocopherol and ascorbyl palmitate on evening primrose oil oxidation?, Journal of Essential Oil Research, vol. 11, no. 5, pp. 643 - 648, 1999.

M.  Charai, Paid, M., and Chaouch, A., ?Essential oils from aromatic plants (Thymus broussonetti Boiss., Origanum compactum Benth., and Citrus limon (L.) N.L. Burm.) as natural antioxidants for olive oil?, Journal of Essential Oil Research, vol. 11, no. 4, pp. 517 - 521, 1999.

K. H. C.  Baser, O?zek, T., Ku?rkcu?oglu, M., Tu?men, G., and Yildiz, B., ?Composition of the essential oils of thymus eucostomus hausskn. et velen var. gypsaceus jalas and Thymus pubescens boiss. et kotschy ex celak var. cratericola jalas?, Journal of Essential Oil Research, vol. 11, no. 6, pp. 776 - 778, 1999.

K. H. C.  Baser, Demirci, B., Ku?rkc?u?oglu, M., and Tu?men, G., ?Composition of the essential oils of Thymus pectinatus Fisch, et Mey. var. pectinatus at different stages of vegetation?, Journal of Essential Oil Research, vol. 11, no. 3, pp. 333 - 334, 1999.

K. H. C.  Baser, Demirci, B., Ku?rkc?u?oglu, M., and Tu?men, G., ?Essential oil of Thymus zygioides Griseb. var. zygioides from Turkey?, Journal of Essential Oil Research, vol. 11, no. 4, pp. 409 - 410, 1999.

K. H. C.  Baser, Ku?rkc?u?oglu, M., Ermin, N., Tu?men, G., and Malyer, H., ?Composition of the essential oil of Thymus pseudopulegioides klokov et des.-shost from Turkey?, Journal of Essential Oil Research, vol. 11, no. 1, pp. 86 - 88, 1999.

K. H. C.  Baser, Ku?rkc?u?oglu, M., and Tu?men, G., ?Essential oils of Thymus striatus Vahl var. interruptus Jalas from Turkey?, Journal of Essential Oil Research, vol. 11, no. 2, pp. 253 - 256, 1999.

A.  Akgul, Ozcan, M., Chialva, F., Monguzzi, F., Akgu?l, A., and O?zean, M., ?Analysis/Composition - Essential Oils of Four Turkish Wild-Growing Labiatae Herbs: Salvia cryptantha Montbr et Auch, Satureja cuneifolia Ten, Thymbra spicata L and Thymus cilicicus Boiss et Bal?, Journal of essential oil research, vol. 11, no. 2, pp. 209 - 214, 1999.