“Organoleptic quality and antioxidant levels kefir derived from goat milk with the addition of different levels of red dragon fruit (hylocereus polyrhizus) juice” (2022) Jurnal Peternakan Lingkungan Tropis, 5(1). Available at: http://e-journals2.unmul.ac.id/index.php/jpltrop/article/view/5185 (Accessed: 27 August 2026).