@article{guoxia yu2026of,
  title={Prevalence of hypomineralised second primary molars among children aged 6–9 years in urban Beijing},
  author={xingyan zhu,hanjun yin,jing hou,cui lin,duojiao xu,yue lv,guoxia yu},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={50},
  number={6},
  pages={125--132},
  doi = {10.22514/jocpd.2026.152},
  year={2026}
}