1. Indonesian Ministry of Agriculture. The Statistics of Food Consumption 2017. (Agricultural Data Center and Information System, Jakarta, 2017).
2. A.T. Bachtiar, Iswandi, Atang and Ishak. Ganendra Nuclear Science and Technology Journal. Letters 22, 11–23 (2019).
3. Y. Pratiwi, Faizatun and Bambang. Increased Benefits of Cow Urine Liquid Organic Fertilizer (Uwais Inspirasi Indonesia, Ponorogo, 2019).
4. F. Setyawan, M. Santoso, and Sudiarso. Journal of Plant Production. Letters 3(8), 697–705 (2015).
5. T. Surtiningsih, Farida, and T. Nurhariyati. Biologic Journal. Letters 15, 31–35 (2009).