Revista Portuguesa de Saúde Pública Print version ISSN 0870-9025
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LACERDA, Andrea C. and CARDOSO, Margarida Fonseca.Smoking among Portuguese teenagers: assessing school, peer and family factors of vulnerability and protection. Rev. Port. Sau. Pub. [online]. 2009, vol.27, n.2, pp.17-25.
ISSN 0870-9025.