@article{avellar_milioni_rabello_simão_2010,  title={On the redistribution of existing inputs using the spherical frontier dea model},  volume={30},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382010000100001},  DOI={10.1590/S0101-74382010000100001},  number={1},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Avellar, José Virgilio Guedes de and Milioni, Armando Zeferino and Rabello, Tania Nunes and Simão, Hugo Passos},  year={2010},  month={Jan},  pages={1–14} }