1. Nature of biotites from alkaline, calcalkaline and peraluminous magmas;Abdel-Rahman;J. Petrol.,1994
2. Rare earth elements in orthites from gneisses and migmatitic pegmatites in Central Rhodopes;Aleksiev;Geochem. Mineral. Petrol.,1987
3. New U–Pb age results from the Central Rhodope Mts. Bulgaria;Arkadakskiy,2000
4. Remnants of Neoproterozoic oceanic crust in the Central Rhodope metamorphic complex, Bulgaria;Arkadakskiy,2003
5. Isotopic geochronology of magmatic and metamorphic rocks from Balkanides and Rhodope Massif;Arnaudov,1989