@article{null,
  title={Retention of composite resin restorations in class IV preparations},
  author={hani eid},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={26},
  number={3},
  pages={251--256},
  doi = {10.17796/jcpd.26.3.g75705380m0w414m},
  year={2002}
}