Revelo-Villacrés, Stalin Ernesto, Oscar David Quiroga-Freire, and Fernando Marcelo Armijos-Briones. “Risk Factors for Tobacco Use in Pregnancy”. Revista Arbitrada Interdisciplinaria de Ciencias de la Salud. Salud y Vida 6, no. 3 (October 1, 2022): 885–891. Accessed October 19, 2026. https://fundacionkoinonia.com.ve/ojs/index.php/saludyvida/article/view/2315.