Mineralogy, age and fluid geochemistry of the rila emerald deposit, Bulgaria Alexandrov, P. /Giuliani, Gaston Zimmermann, J.L. MINERAL BERYLIUM GISEMENT ENDOGENE GEOCHIMIE MINERALISATION ALTERATION HYDROTHERMALE TALC SCHISTE DATATION ANALYSE ISOTOPIQUE 2001 text https://www.documentation.ird.fr/hor/fdi:010029770 fdi:010029770 Alexandrov P., Giuliani Gaston, Zimmermann J.L.. Mineralogy, age and fluid geochemistry of the rila emerald deposit, Bulgaria. 2001, 96, 1469-1476 EN BULGARIE