Grigorios Magklis José González Antonio González Frontend Frequency-Voltage Adaptation for Optimal Energy-Delay^2. 250-255 2004 conf/iccd/2004 ICCD http://csdl.computer.org/comp/proceedings/iccd/2004/2231/00/22310250abs.htm db/conf/iccd/iccd2004.html#MagklisGG04