Boghori, Mahmoud, and Seyed Ali Tabatabai. “The Effect of Irrigation Intervals and Nitrogenous Fertilizer on the Quantitative and Qualitative Performance of Chamomile”. International Academic Journal of Science and Engineering, vol. 4, no. 2, Dec. 2017, pp. 128-34, https://iaiest.com/iaj/index.php/IAJSE/article/view/IAJSE1710032.