Hendawy S. F., El-Gendy A. G., El Gohary A.E, Hussein M.S., Danova K. and E. A. Omer 2015. Evaluation of biomass formation, essential oil yield and composition of four different Matricaria recutita L. cultivars grown in Egypt. World Journal of Pharmaceutical Sciences. 3, 5 (May 2015), 830–839.