On Sun, 25 Nov 2001, David Simmons wrote: > > cf the Castagna's nice paper > > http://citeseer.nj.nec.com/castagna95covariance.html > > Sorry, I could not access the paper on that site without an ACM online > library membership. Feel free to send me a PDF if available. > I get a link up in the right corner to a cached PDF. The link is long so may not come out right but anyway: http://citeseer.nj.nec.com/cache/papers/cs/1026/http:zSzzSzwww.dmi.ens.frzSzftpzSzpubzSzdmizSzuserszSzlienszSzliens-94-18.A4.pdf/castagna94covariance.pdf Regards, /Robert