Tichoniuk, Mariusz, Natalia Radomska, and Ryszard Cierpiszewski. “The Application of Natural Dyes in Food Freshness Indicators Designed for Intelligent Packaging”. Studia Oeconomica Posnaniensia 5, no. 7 (July 31, 2017): 19–34. Accessed September 3, 2026. https://journals.ue.poznan.pl/soep/article/view/3640.