1. COURANTS DE LA DIDACTIQUE DES MATHEMATIQUES DANS L”ESPACE FRANCOPHONE DU XX SIECLE. Authors: IOANA MAGDAŞ, DUMITRU VĂLCAN.2. INDECOMPOSABLE SUBGROUPS OF TORSION-FREE ABELIAN GROUPS. Authors: DUMITRU VĂLCAN.3. INDECOMPOSABLE SUBGROUPS OF TORSION-FREE ABELIAN GROUPS. Authors: DUMITRU VĂLCAN.