@article{pradenas_campos_saldaña_parada_2011,  title={Scheduling copper refining and casting operations by means of heuristics for the flexible flow shop problem},  volume={31},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382011000300002},  DOI={10.1590/S0101-74382011000300002},  number={3},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Pradenas, Lorena and Campos, Abel and Saldaña, Jesús and Parada, Victor},  year={2011},  month={Sep},  pages={443–457} }