Rithe, R., S. Chou, J. Gu, A. Wang, S. Datla, G. Gammie, D. Buss, A. Chandrakasan, "The Effect of Random Dopant Fluctuations on Logic Timing at Low Voltage," IEEE Transactions on Very Large Scale Integration (TVLSI) Systems, Vol. 20, No. 5, 911-924, May 2012.