1. POWER PLANTS ASHES RECOVERY IN ECO-FRIENDLY MORTAR COMPOSITIONS. Authors: GOG ADRIANA, ROMAN MARIUS, ROMAN CECILIA, GAGEA LUCIA, TÓTH ANIKÓ, VALENTINA CETEAN, LÁSZLÓ SZÉLL.2. NATURAL, CULTURAL AND HISTORICAL HERITAGE: THE EARTHWORK VESTIGES FROM THE IVĂNEŢU MT. (EASTERN CARPATHIANS, ROMANIA). Authors: VALENTINA CETEAN.3. BUILDINGS AND DIMENSION STONES: ROMANIAN DIMENSION STONES: BEHAVIOUR UNDER CLIMATIC VARIATIONS AND FINAL USE. Authors: VALENTINA CETEAN.4. RECOVERY POSSIBILITIES OF POWER PLANT FLY ASH FROM ZALĂU. Authors: ADRIANA GOG, MARIUS ROMAN, CECILIA ROMAN, TÓTH ANIKÓ, LUCIA GAGEA, VALENTINA CETEAN, LÁSZLÓ SZÉLL.