@article{pacca_1998,  title={Há Vinte Anos},  volume={9},  ISSN={0103-6564},  url={https://doi.org/10.1590/S0103-65641998000100023},  DOI={10.1590/S0103-65641998000100023},  number={1},  journal={Psicologia USP},  publisher={Instituto de Psicologia da Universidade de São Paulo},  author={Pacca, Jesuína Lopes de Almeida},  year={1998},  pages={137–139} }