1. SUSPENSION BASED ON A MIXTURE OF TITANIA-SILICA-FUNCTIONALIZED GRAPHENE OXIDE FOR SURFACE CONSOLIDATION OF HISTORICAL ANDESITE STONE AND MORTAR. Authors: V. DANCIU, I. OLTEANU, G. OLTEANU, M. BAIA, L. BAIA, ZS. TOTH, I. SZÉKELY, A. MIHIS, C. SALAGEAN, L.C. COTET.