Journal Article
Xi, Bo, Yajun Liang, Yunxia Liu, Yinkun Yan, Min Zhao, Chuanwei Ma, and Pascal Bovet.
"Tobacco use and second-hand smoke exposure in young adolescents aged 12-15 years: data from 68 low-income and middle-income countries." The Lancet Global Health 4, no. 11 (2016): e795-e805.