Yorulmaz, F., Z. Akturk, N. Dagdeviren, and A. Dalkilic. “Smoking Among Adolescents: Relation to School Success, Socioeconomic Status Nutrition and Self-Esteem”. Swiss Medical Weekly, vol. 132, no. 3132, Aug. 2002, pp. 449-54, doi:10.4414/smw.2002.10011.