@article{farsi_arezoo_2011,  title={Bending force and spring-back in v-die-bending of perforated sheet-metal components},  volume={33},  ISSN={1678-5878},  url={https://doi.org/10.1590/S1678-58782011000100007},  DOI={10.1590/S1678-58782011000100007},  number={1},  journal={Journal of the Brazilian Society of Mechanical Sciences and Engineering},  publisher={Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM},  author={Farsi, Mohammad Ali and Arezoo, Behrooz},  year={2011},  month={Jan},  pages={45–51} }