GEORGIEVA, S.; VASSILEVA, R.; GROZDEV, V.; MILENKOV, G.; CEMPÍREK, J.; ŠKODA, R.; STEFANOVA, E. Incompatible Elements (REE, Th, U, Nb, Ta, Ti) Mineral Association in Altered Pegmatite from the Djurkovo Pb-Zn Deposit, Central Rhodopes: Occurrence and Geochemical Properties. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 77, n. 10, p. 1474–1484, 2024. DOI: 10.7546/CRABS.2024.10.07. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/627. Acesso em: 12 nov. 2025.