BibTeX, biblatex and biber ⇒ Problem: global bibliography using bibunits + natbib

[zdroshnya]

Hi all
first post here

I'm writting my thesis, and I've put a quite modular structure: each chapter is in a different directory, an own .bib.
I'm also using bibunits for having a chapter-wise bibliography

Code: Select all

\usepackage[sectionbib,globalcitecopy]{bibunits}
\usepackage{natbib}
....
\bibliographyunit[\chapter]
\defaultbibliography{main,Chapter3/ch3,Chapter4/ch4,Chapter5/ch5,Chapter6/ch6,Chapter7/ch7,Chapter8/ch8}
\defaultbibliographystyle{plainnat}

After each chapter, I'm using \putbib, and this is working great for each chapter.

However, I also need a global bibliography, just after the conclusion.
My attempts so far have been unsuccessful.
Any idea how to do this?

best,
miguel