W. Wijaningsih, D. Wulandari, and S. Sunarto, “Nutritional Value, Sugar Content, Acidity, Fiber Content, Total Bacteria, and Acceptability of Mixed Fruit Kefir and Milk Fruit Kefir”, Jurnal Riset Kesehatan, vol. 14, no. 2, pp. 144–153, Nov. 2025.