1. OBSIDIAN PROVENANCE STUDIES OF TRANSYLVANIA’S NEOLITHIC TOOLS USING PIXE, MICRO-PIXE, PIGE, RBS AND XRF. Authors: BOGDAN CONSTANTINESCU, ROXANA BUGOI.2. THE USE OF X-RAY FLUORESCENCE FOR ARCHAEOLOGICAL GOLD OBJECTS PROVENANCE STUDIES. Authors: DANIELA STAN, CĂTĂLINA PĂUNA, BOGDAN CONSTANTINESCU.