@article{goyal s2014of,
  title={Assessment of Skeletal Maturation using Mandibular Second Molar Maturation Stages},
  author={goyal s,goyal s,gugnani n},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={39},
  number={1},
  pages={79--84},
  doi = {10.17796/jcpd.39.1.9224022173577151},
  year={2014}
}