Unicode characters in bibtex

I am struggling with unicode chars in bibtex (Debian). I have the following entry in my .bib file:

@Book{bjork2009,
author = {Tomas Björk},
title = {Arbitrage Theory in Continuous Time},
publishe = {Oxford University Press},
year = {2009}
}

and it works fine for plain bibliography style, but fails horribly for the more alphanumeric styles (e.g. apa, alpha) - the error reported is:

! Undefined control sequence.
<argument> \protect \astroncite 
                                {Björk}{2009}
l.3 ...rotect\astroncite{Björk}{2009}]{bjork2009}

any ideas how to get it working?

Solution 1:

Bibtex is not really unicode aware. In order to use extended characters, you need to use the standard Tex replacements.

You might however want to use biblatex for a better management of bibliographic styles; and maybe have a look at biber, which aims to become a unicode aware Bibtex replacement.