converting utf8 encoded bib file to ascii

[Csikos Bela]

Hello:

I am searching for a linux program which can convert a bibtex bibliography file 
from utf8 encoding to ascii or latin-1. Which can convert special characters to 
"latex type" characters, eg. á --> \'{a}, ü --> \"{u}, Ł  --> \L etc.

If you know such a program, please let me know.

Thanks,

bcsikos