Chatalov, Athanas, and Ivan Savov. 2024. “Strontium Isotope Composition of Triassic Coastal and Shallow Marine Carbonates in the Western Balkanides, NW Bulgaria”. Proceedings of the Bulgarian Academy of Sciences 77 (9). Sofia, Bulgaria:1312–1321. https://doi.org/10.7546/CRABS.2024.09.06.