Vliek, L., Overbeek, G. & Orobio de Castro, B. (2019).

Effects of Topper Training on psychosocial problems, self-esteem, and peer victimisation in Dutch children: A randomised trial. PLOS ONE 14 (11cts of Topper Training on psychosocial problems, self-esteem, and peer victimisation in Dutch children: A randomised trial. PLOS ONE 14 (11