K.  Loz?iene and Venskutonis, P. R., ?Chemical composition of the essential oil of Thymus serpyllum L. ssp. serpyllum growing wild in Lithuania?, Journal of Essential Oil Research, vol. 18, no. 2, pp. 206 - 211, 2006.

M. L.  Arrebola, Navarro, M. C., and Jime?nez, J., ?Essential Oils from Satureja obovata, Thymus serpylloides subsp. serpylloides and T. serpylloides subsp. gadorensis Micropropagated Plants?, Journal of Essential Oil Research, vol. 9, no. 5, pp. 533 - 536, 1997.

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.