@article{2000,  title={Nota dos Editores Convidados},  volume={20},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382000000100002},  DOI={10.1590/S0101-74382000000100002},  number={1},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  year={2000},  month={Jun},  pages={03–03} }