@article{hernández m2008chronology,
  title={Eruption Chronology of the Permanent Dentition in Spanish Children},
  author={hernández m,espasa e,boj jr},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={32},
  number={4},
  pages={347--350},
  doi = {10.17796/jcpd.32.4.r1gp36615p54w642},
  year={2008}
}