Geochemistry and U-Pb Geochronology of Late Paleozoic Magmatism in a Part of the Western Balkan Zone, NW Bulgaria. - Bonev, Nikolay; Filipov, Petyo; Stoylkova, Tanya; Vladinova, Tzvetomila; Georgieva, Hristiana (Applied Sciences (2076-3417), 2026)