Hien, T., and T. Thang. “Effects of Nitrogen on Growth and Nitrate Accumulation in Mustard Green (Brassica Juncea L. ) in the Hydroponic System”. Science & Technology Development Journal: Natural Sciences, Vol. 6, no. 3, Aug. 2022, pp. 2158-66, doi:https://doi.org/10.32508/stdjns.v6i3.1170.