Supriya Krishnamurthy Sameh El-Ansary Erik Aurell Seif Haridi Comparing Maintenance Strategies for Overlays. 473-482 2008 PDP http://doi.ieeecomputersociety.org/10.1109/PDP.2008.18 conf/pdp/2008 db/conf/pdp/pdp2008.html#KrishnamurthyEAH08