> Hi there! Does anyone have a solution to this problem...
>
> In my bibtex file I have two entries (one's an "@article" and the other an
> "@conference") by the same authors in the same year, but the second, third
> and fourth author names appear in a different order e.g.
>
> @article{smith_etal2006a,
>  author={Smith, D. and Jones, E. and Bill, H. and Ben, P.},
>  title={blah blah},
>  journal={blah blah},
>  volume={xx},
>  year={2006},
> }
>
> @conference{smith_etal2006b,
>  author={Smith, D. and Ben, P. and Jones, E. and Bill, H.},
>  title={blah blah},
>  booktitle={blah blah},
>  year={2006},
> }
>
> When I compile the above using Chicago style an "a" or "b" is not attached
> to the year field. This is a problem since both articles are then cited as
> "Smith et al. (2006)" in the text and therefore cannot be differentiated.
>
> I tried manually adding the "a" and "b" in the year field in the
> Bibtex file
> but the cite command then omits the first digit of the year in the output.

I don't know the Chicago style, but you could try using 'natbib'; it's compatible with a lot of styles and does add the 'a' and 'b', when appropriate.

Cheers,  Phil