8Pawelski J. Toward A New Generation of Positive Interventions. Paper Presented at the First World Congress of Positive Psychology, Philadelphia, PA, USA: 2009:18-21.
10Seligman M E P, Ernst R M, Gillham J, Reivich K, Linkins M. Positive Education: Positive Psychology and Classroom Interventions. Oxford Review of Education, 2009, 35 (3): 293-311.