The script re-orders references in the .tex file (in the order as they 
appear in the text).  This is REQUIRED by most of the journals, this is 
TEDIOUS to do manually (in average each article contains ~50 citations) 
and unfortunately none of the LateXs which I know can do this job.
The script is written in Perl (pre-installed on most Linux OS), but can 
be easily rewritten in other languages.