Although the topic already has an answer, some experience to give some toughts to possible workaround.

I wrote my thesis on OpenOffice. The thesis has as results two articles like this:

Summary
Introduction
Obective
Methods
Results
...Article 1
......Summary
......Introduction
......Objectives
......Methods
......Results
......Conclusion
......Bibliography
...Article 2
......Summary
......Introduction
......Objectives
......Methods
......Results
......Conclusion
......Bibliography
Discussion
Conclusion
Bibliography

See in my case, I have three bibliographies. In order to have these in order I worked on three different files and later I merged the files. I lot of work becase after meging the files some figures and tables moved around or changed format. Also, after the merging the files, the text may need correction, but coution is necessry not to change the citation order neither to delete old citation nor insert new ones. To have a tool to make more than one bibliography section within a file would save me a lot of time.

Spent some nights awke to workaround... but it is done.

Kind regards