@article{vargas_rego_clode_2018,  title={Robson Classification System Applied to Induction of Labor},  volume={40},  ISSN={0100-7203},  url={https://doi.org/10.1055/s-0038-1667340},  DOI={10.1055/s-0038-1667340},  number={9},  journal={Revista Brasileira de Ginecologia e Obstetrícia},  publisher={Federação Brasileira das Sociedades de Ginecologia e Obstetrícia},  author={Vargas, Sara and Rego, Susana and Clode, Nuno},  year={2018},  month={Sep},  pages={513–517} }