And the slides cite a paper from 1977: http://dl.acm.org/citation.cfm?id=321999 http://dl.acm.org/citation.cfm?id=321999 Nice to see that somebody knows how to

And the slides cite a paper from 1977: http://dl.acm.org/citation.cfm?id=321999 http://dl.acm.org/citation.cfm?id=321999 Nice to see that somebody knows how to dig through history.