Yousefzadeh, S., Modarres-Sanavy, S. A. M., Sefidkon, F., & Ghiasy Oskuee, M. "Effect of biofertilizer, azocompost and nitrogen on oil yield and essential oil content of Dracocephalum moldavica L.", Iranian Journal of Horticultural Science, 46, 4, 2015, 601–611. doi: 10.22059/ijhs.2015.56908