Arifani, Erlina Nur, et al. “Freshness Levels and Changes in NH3, H2S Gases, and Color in Beef During Room Temperature Storage”. Elinvo (Electronics, Informatics, and Vocational Education), vol. 10, no. 1, June 2025, https://journal.uny.ac.id/index.php/elinvo/article/view/77601.