Henri Naccache Gerald C. Gannod Using Proportional-Integral-Derivative Control in Self-Healing Adaptive Content Systems. 797-804 2009 SERVICES I http://doi.ieeecomputersociety.org/10.1109/SERVICES-I.2009.105 conf/services/2009-1 db/conf/services/services2009-1.html#NaccacheG09