1. STRUCTURAL INVESTIGATIONS OF AG2O-B2O3-CAO-P2O5 GLASS AND GLASS-CERAMIC SYSTEM. Authors: VIORICA SIMON, NICOLAE LEOPOLD, GHEORGHE BORODI, IOAN BRATU, RĂZVAN ŞTEFAN.2. STRUCTURAL INVESTIGATION OF xFE2O3•(70-x)B2O3 •15ZNO•15CAO GLASSES BY INFRARED SPECTROSCOPY AND DFT CALCULATIONS. Authors: IOAN BRATU, SILVANA POPESCU, GEORGETA ŢARĂLUNGĂ, ALEXANDRU MARCU, EMIL VINŢELER, RĂZVAN ŞTEFAN.