Every paper written by Hans Boehm is worth reading: <a href="http://www.hpl.hp.com/personal/Hans_Boehm/pubs.html" rel="nofollow">http://www.hpl.hp.com/personal/Hans_Boehm/pubs.html</a><p>(If the paper you want to read is behind a pay-wall, google its title and you will likely find a freely available copy.)