Samadimatin, Amirhossien, Hani, Abbas. “Effect of ethanol and humic acid foliar spraying on morphological traits, photosynthetic pigments and quality and quantity of essential oil content of Dracocephalum moldavica L..” Iranian Journal of Plant Physiology, vol. 8, no. 1, 2017, pp. 2299-2306. 10.30495/ijpp.2017.539079