Bibliography is shown on partially

In the References list at the end of my latex document, only the first 14 references are shown, while the others are not (I use a bib file with around 50 references).

The error is:

! TeX capacity exceeded, sorry [save size=4000].
\bibsgerman ...ef \Btxeditorlong {\btxeditorlong }
l.153


What could trigger this?

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Without seeing the code, I would recommend you download JabRef and inspect the bib file for syntax error. This can be a result of a missing grouping symbol. –  R. Schumacher Apr 27 '12 at 2:35
These kinds of errors are usually caused by some kind of infinite recursions, e.g. like macros calling themselves. If possible, please provide a minimal example that shows the issue. Without further information it's impossible to track it down. Also, have a look at this question and the accepted answer. Maybe you're problem is related to it. –  Martin Apr 27 '12 at 5:30
Seeing that the part of memory which is exausted is the "save size" makes me suspect of a programming error in your macros. –  egreg Apr 27 '12 at 8:25