@article{kormann_portella_pereira_santos_2003,  title={Study of the performance of four repairing material systems for hydraulic structures of concrete dams},  volume={49},  ISSN={0366-6913},  url={https://doi.org/10.1590/S0366-69132003000100011},  DOI={10.1590/S0366-69132003000100011},  number={309},  journal={Cerâmica},  publisher={Associação Brasileira de Cerâmica},  author={Kormann, A. C. M. and Portella, K. F. and Pereira, P. N. and Santos, R. P.},  year={2003},  month={Jan},  pages={48–54} }