David Bainbridge Ian H. Witten Stefan J. Boddie John Thompson Stress-Testing General Purpose Digital Library Software. 203-214 2009 ECDL http://dx.doi.org/10.1007/978-3-642-04346-8_21 conf/ercimdl/2009 db/conf/ercimdl/ecdl2009.html#BainbridgeWBT09