Have a look at the unsrt styles. I think that's what you're wanting.
André Rygh wrote:
> I am using Lyx 1.4.2 under windows and a standard tau.bib file I have
> editet to suit my references.
>
> For some reason the bibliography will not show in up numerical order as
> used in the text, but seems like articles are first and then
> books.This is under the default plain style. After a while I found a
> style that shows references in numerical order, I would prefer the
> plain style for how my references look, but it has to be numerical.
> Any suggestions to where I can find styles that suit this?
>
>
> Thanks for all help!
> Andre