Ah, yes, the paper Atwood mentions is the one. The draft paper has since been taken offline (and I can't seem to find the published paper) but still available o

Ah, yes, the paper Atwood mentions is the one. The draft paper has since been taken offline (and I can't seem to find the published paper) but still available on archive.org. [1] Thanks! [1] http://web.archive.org/web/20091122080500/http://www.cs.mdx.ac.uk/research/PhDArea/saeed/paper1.pdf http://web.archive.org/web/20091122080500/http://www.cs.mdx....