Andrea Calimera Enrico Macii Massimo Poncino NBTI-aware sleep transistor design for reliable power-gating. 333-338 2009 ACM Great Lakes Symposium on VLSI http://doi.acm.org/10.1145/1531542.1531618 conf/glvlsi/2009 db/conf/glvlsi/glvlsi2009.html#CalimeraMP09