I am writing my PhD (chemistry) with LyX (being completely new to LaTeX, I thought it would be easier).
Up to now I am totally satisfied with this software and its capabilities. From a template found on the web, I managed to do pretty much everything I wanted. Except ... the bibliography!
My thesis is divided into six chapters (in the form of sub-documents that fit into a main thesis file) so I built a bibliography with multiple file .bib for each chapter (and the option enabled in the document settings ). Each chapter is started and ended by
\begin{btUnit}
and \end{btUnit}
, respectively, as described in the manual of advanced options. When I preview my bibliography is well managed and appears in the PDF output. So everything is fine you will tell me?! Well not everything!! My problem concerns the numbering. I chose to use natbib numbered citations (with implicit numbering it gives me a lot of LaTeX errors...), and instead of being incremented progressively in the text, their number corresponds to their place in the reference list, which is sorted alphabetically by authors. I use the style "unsrt", which is supposed to sort the references in order of appearance, but it does not work. I actually tried a dozen styles but without success ... (and a few hours reading the forums ....)
In "Plan B" my library works with the "author-date" style but really I'd rather be able to number them, and in order!
My question is simple - would there be a kind soul to help a PhD student near the nervous breakdown?

Thank you!
PS: I'm not sure at all about what is important or not to mention so I await your requests!