This is pdfTeX, Version 3.1415926-1.40.9 (MiKTeX 2.7) (preloaded format=pdflatex 2009.12.2)  8 DEC 2009 10:29
entering extended mode
**paperrefs.bib
(paperrefs.bib
LaTeX2e <2005/12/01>
Babel <v3.8l> and hyphenation patterns for english, dumylang, nohyphenation, ge
rman, ngerman, german-x-2008-06-18, ngerman-x-2008-06-18, french, loaded.

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.4 @
     ARTICLE{Zyt1993,
? 
! Emergency stop.
 ...                                              
                                                  
l.4 @
     ARTICLE{Zyt1993,
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

 
Here is how much of TeX's memory you used:
 8 strings out of 95304
 233 string characters out of 1183032
 45021 words of memory out of 1500000
 3306 multiletter control sequences out of 110000
 3640 words of font info for 14 fonts, out of 3000000 for 5000
 14 hyphenation exceptions out of 8191
 5i,0n,4p,59b,14s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!