Astuti SD, S. S, Laga A, Bilang M, Mochtar H, Waris A. Characteristics of pH, Total Acid, Total Soluble Solid on Tomato Juice by Ohmic Heating Technology. IJSBAR. 2018;39(2):21-28. Accessed October 12, 2025. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/9001