square brackets?

is there any way to get references to use square brackets?  i need it
when a reference is contained within parens.  for example:

       plants consume CO2 (as we all know [smith 2000]) for their carbon
source.


And now for an unrelated thought:

is there a competitor for Thompson's reference manager apps on Windows?

I don't think there really is.  Web-based solutions don't count, in my 
opinion.  I wonder if development on endnote would cook along faster if 
there were.  Didn't Thompson buy up all the other reference manager 
companies at one point?

thanks,
allie