Thu, Tat Anh, et al. “Effect of Humate and Controlled Released NPK Fertilizers (NPK-CRF) on Rice Yield and Soil Fertility of Intensive Alluvial Soils”. 2022. Plant Science Today, vol. 10, no. 1, Jan. 2023, pp. 146-51, doi:10.14719/pst.1926.