Strollo, M. R., A. Romano, and G. Rea. “Social Commitment of Volunteering in Clown-Therapy: An Empowering Empirical Research”. Ricerche Di Pedagogia E Didattica. Journal of Theories and Research in Education, vol. 10, no. 3, Jan. 2015, pp. 45-79, doi:10.6092/issn.1970-2221/5912.