Mele, Enea, Eugenia Tsalkitzi, Elias Constantos, Charalambos Elias, Yannis Koutsoubis, Aphrodite Ktena, Christos Manasis, Christos Tatsiopoulos, and Anna Tatsiopoulou. 2015. “GAMIFYING ENERGY USER PROFILES”. European Scientific Journal, ESJ 11 (10). https://eujournal.org/index.php/esj/article/view/6176.