Redistribution of incompatible elements during hydrothermal alteration of pegmatite from the Djurkovo Pb-Zn deposit, Central Rhodopes. - Georgieva, Sylvina; Vassileva, Rossitsa D.; Grozdev, Valentin; Milenkov, Georgi; Cempírek, Jan; Škoda, Radek; Stefanova, Elitsa (Review of the Bulgarian Geological Society, 2023)