@article{tomás_2012,  title={Single-parenting: a case of class division on ideas of marriage and motherhood},  volume={29},  ISSN={0102-3098},  url={https://doi.org/10.1590/S0102-30982012000100017},  DOI={10.1590/S0102-30982012000100017},  number={1},  journal={Revista Brasileira de Estudos de População},  publisher={Associação Brasileira de Estudos Populacionais},  author={Tomás, Maria Carolina},  year={2012},  month={Jan},  pages={213–216} }