Pacifici, Roberta, et al. “Emerging Trends in Consuming Behaviours for Non-Controlled Substances by Italian Urban Youth: A Cross Sectional Study”. Annali dell’Istituto Superiore Di Sanità, vol. 52, no. 1, Jan. 2016, pp. 104-13, https://annali.iss.it/index.php/anna/article/view/206.