References are an important part of the application, and the citation of references not only reflects a scientific researcher's understanding of the development of this field, but also reflects the applicant's research level and level to a certain extent. Generally, 20 ~ 50 articles are cited, neither too few nor too many.

The project applicant must quote and refer to the top journals, the latest and most important documents in this research field, indicating that he has fully grasped the frontier, research direction and trend in this field; In addition, the literature of domestic counterparts can be quoted appropriately to avoid low-level repetition; You can also cite your previous published articles to show your research foundation.