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Ginevra, Maria Cristina; Sgaramella, Teresa Maria; Ferrari, Lea; Nota, Laura; Santilli, Sara; Soresi, Salvatore . (2017). Visions about future: a new scale assessing optimism, pessimism, and hope in adolescents. International Journal for Educational and Vocational Guidance, 17(2), 187–210. doi:10.1007/s10775-016-9324-z 
10.1007/s10775-016-9324-z