M. Possato, C. M. G. de L. Parada, and V. L. P. Tonete, “Representation of pregnant smokers on cigarette use: a study carried out at a hospital in the interior of the state of São Paulo”, Rev. Esc. Enferm. USP, vol. 41, no. 3, pp. 434–440, Sep. 2007, doi: 10.1590/S0080-62342007000300013.