1) The documents cited in this article are coded in Arabic characters in sequence, and the serial numbers are placed in square brackets.

2) When multiple files are referenced in the same place, the serial numbers of all files are listed in square brackets, with ","between each serial number.

3) If there is a continuous serial number, the starting and ending number "-"can be marked.

Example: Zhang San pointed out that Li Si [2-3] thought that various mathematical models were formed [7, 9,113].

4) The same document has been cited for many times in the treatise, and the number is only 1. The cited page number is placed outside "[]", and the page number is not repeated in the literature list.

Example: Zhang×××15-17; Zhang ××× 55; Zhang×××101-105.

The label format is as follows:

Web page: marked by author, title, web page, year and date.

Books: marked with author, title, publishing house, publication year, edition number and page number.

Periodicals: marked by author, article title, periodical name, year (issue number) and page number.

Newspapers: marked in the order of author, article title, newspaper name, year and date, and edition.