Stamboliyska, Bistra, Denitsa Yancheva, Maya Guncheva, Nikolay Lumov, Maria Argirova, and Simeon Stoyanov. “Characterization of Organic Materials in Wall Paintings in Bulgaria: A Multi-Analytical Approach”. Proceedings of the Bulgarian Academy of Sciences 79, no. 6 (June 26, 2026): 716–725. Accessed July 21, 2026. https://proceedings.bas.bg/index.php/cr/article/view/990.