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 [1] pointed out that … Li Si [2-3] thought that … formed a variety of mathematical models [7,9,1-13] …

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×× [4]15-17 ...; Zhang ×× [4] 55 ...; Zhang××× [4]101-105 ...