@article{pablo f. abate2001hardness,
  title={Barcoll hardness of dental materials treated with an APF foam},
  author={pablo f. abate,silvana m. bertacchini,franklin garcia godoy, ricardo l. macch},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={25},
  number={2},
  pages={143--146},
  doi = {10.17796/jcpd.25.2.rw03351p32336r25},
  year={2001}
}