Tawfik, R. S., A. Badr, R. Sammour, U. Ibrahim, M. Matter, and M. Sakr. “Improvement of Flax Drought Tolerance Using Gene Transfer”. Plant Tissue Culture and Biotechnology, vol. 26, no. 2, Dec. 2016, pp. 197-0, doi:10.3329/ptcb.v26i2.30570.