LyX ⇒ How to manage a multipart bibliography document

[Edulis]

I'm working on a multipart document (book (KOMA-Script), Lyx v1.6.7).
Two of the chapters have their own bibliographic file (Jav.Ref 2.6), added at the end of the chapter.

When I compile each chapter separately, each PDF is generated correctly.
However, when I compile the pdf-multipart, the first chapter is referenced correctly, but not the second.

In this second chapter, all the references inserted in the text appear like: [?], and the bibliography section added at the end of this chapter consist of a copy of the first-chapter bibliography-section.

The references of this second chapter have disappeared.

How can I do to overcome this problem?

[Edulis]

I managed to compile the multi bibliographic files following the advice given in this forum:
http://www.latex-community.org/forum/vi ... 50&t=10805

Both chapters create their PDF-section correctly at the end of each chapter, but in both cases, the references are ordered alphabetically. How could I order it chronologically?

I am using:
Bibtex, with unrst style.

[Edulis]

When I say "chronologically", I want to mean following the order of text (1, 2, 3...), not following a year-order.