Stamboliyska, B., Yancheva, D., Guncheva, M., Lumov, N., Argirova, M., & Stoyanov, S. (2026). Characterization of Organic Materials in Wall Paintings in Bulgaria: A Multi-analytical Approach. Proceedings of the Bulgarian Academy of Sciences, 79(6), 716–725. https://doi.org/10.7546/CRABS.2026.06.02