@article{albuquerque_rodrigues_2006,  title={Characteristics of the double-torsion test to determine the R-curve of ceramic materials},  volume={9},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392006000400004},  DOI={10.1590/S1516-14392006000400004},  number={4},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Albuquerque, Maria da Consolação Fonseca de and Rodrigues, José de Anchieta},  year={2006},  month={Oct},  pages={361–368} }