Astuti, S. D., S. S., A. Laga, M. Bilang, H. Mochtar, and A. Waris. “Characteristics of PH, Total Acid, Total Soluble Solid on Tomato Juice by Ohmic Heating Technology”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 39, no. 2, June 2018, pp. 21-28, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/9001.