Perceived pubertal timing, pubertal status and the prevalence of alcohol drinking and cigarette smoking in early and late adolescence: a population based study of 8950 Norwegian boys and girls.
Bratberg GH, Nilsen TI, Holmen TL, Vatten LJ. Perceived pubertal timing, pubertal status and the prevalence of alcohol drinking and cigarette smoking in early and late adolescence: a population based study of 8950 Norwegian boys and girls. Acta Paediatr. 2007 Feb; 96(2):292-5.