Overturf, M. C. ., W. M. . Chrosny, and R. G. . Stine. “Energy Sufficiency Kaizen Achieving Zero Energy Cost and Variance With Sufficiency-Inclu- Sive Private Energy Portfolios”. Distributed Generation &Amp; Alternative Energy Journal, vol. 26, no. 4, Oct. 2011, pp. 36-56, doi:10.13052/dgaej2156-3306.2643.