This contains published papers and preprints in accordance with the publishers' policies. We note the following categories (SHERPA-ROMEO and HARNAD):

ROMEO yellow; HARNAD paleGreen

Authors may archive pre-refereed material but not final documents

ROMEO blue; HARNAD brightGreen

Authors may archive post-publication documents

ROMEO green, HARNAD brightGreen

Authors may archive both of the above

We have examples of all the first two.

ROMEO white, HARNAD grey

Authors may not archive anything. A typical gray publisher is the American Chemical Society (see quote in 1810/741).

We have no examples of these.

The policy and practice of Open Access is changing rapidly during 2004 and although we will hope to update this space we cannot guarantee it. We have not knowingly offended against the details of publishers' copyrights and agreements - please contact us if you think there is a problem.