Olfa, B., T. Imen, C. Mohamed, and B. Nasri-Ayachi M. “Essential Oil and Trichome Density from Origanum Majorana L. Shoots Affected by Leaf Age and Salinity”. Bioscience Journal, vol. 32, no. 1, Jan. 2016, pp. 238-45, doi:10.14393/BJ-v32n1a2016-30323.