You need to write a program

Programmer services are required. You need to write a program that combines the list of literature.
There's a source file.
(1) The programme shall make the reference list at the end of the book which is uniform and its numbering coincides with the reference numbering in the document.
(2) The number in the reference list is indicated in square brackets (see screenshot). In the general list of literature, it changes.
Example:
Outgoing file
Output file
Difference in files:
(1) List of references combined
(2) In the second material, the meanings of the list of references have changed
It was - Stallo.
[1] -[6]
[2] - [7]
[3] - [8]
[4] - [9]
[5] - [10]