@article{ha_2014, 
  title={Two methods for culture of apical papilla stem cells from immature human tooth}, 
  volume={36}, 
  DOI={10.15625/0866-7160/v36n1se.4399}, 
  number={1se}, 
  publisher={Publishing House for Science and Technology, Vietnam Academy of Science and Technology}, 
  author={Ha}, 
  year={2014}, 
  month={Aug}
  }