bibtex formating help

[Marcin Bukat]

Hello!
I have problem with bibtex references.
Example:
entry in .bib file
@article{mozliwe_zastosowania_polimerowych_elektrolitow_2,
        author = {M. B. Aramnd, J. M. Chabagno, M. Duclot, P. in 
Vashista, J. N. Mundy, G. K. Shenoy},
        title = {Fast Ion Transport in Solids},
        journal = {Elsevier},
        year = 1970,
        volume = 131
}

Now as You can see there are multiple authors. The problem is that in 
reference authors are separated by spaces insted of comas, exept last 
one. It looks like this:
M. B. Aramnd J. M. Chabagno M. Duclot, P. in Vashista J. N. Mundy, G. K. 
Shenoy                                                          ^^^

I'm using plain.bst (or plplain.bst but this dosn't matter).
How can I get author separated by comas (like in 'source entry')?
Any help welcome

wo