@article{guedes_lima_lima_guedes_2018,  title={Validation of a questionnaire for the evaluation of informal social support for the elderly: section 1},  volume={21},  ISSN={1809-9823},  url={https://doi.org/10.1590/1981-22562018021.180119},  DOI={10.1590/1981-22562018021.180119},  number={6},  journal={Revista Brasileira de Geriatria e Gerontologia},  publisher={Universidade do Estado do Rio Janeiro},  author={Guedes, Marcello Barbosa Otoni Gonçalves and Lima, Kenio Costa and Lima, André Luiz and Guedes, Thais Sousa Rodrigues},  year={2018},  month={Nov},  pages={647–656} }