Babaei Aghjedarbandه, Fatemeh, Jamshidi, Soleiman, Nourafcan, Hassan. “The effect of chitosan and ascorbic acid foliar spraying on  coneflower vegetative and reproductive indices.” Agroecology Journal, vol. 14, no. 3, 2018, pp. 39-47. 10.22034/aej.2018.544618