Valentini, M., Mancini, M., Raiola, G. and Federici, A. 2019. Digital and non-verbal communication in preschool: A systematic review. Journal of Human Sport and Exercise. 14, 4proc (Oct. 2019), S997-S1016. DOI:https://doi.org/10.14198/jhse.2019.14.Proc4.62.