@article{BeckerFrewAndresenetal.2015,
  author    = {Sarah Becker and Bethany A. Frew and Gorm B. Andresen and Mark Z. Jacobson and Stefan Schramm and Martin Greiner},
  title     = {Renewable build-up pathways for the US: Generation costs are not system costs},
  journal   = {Energy},
  volume    = {81},
  pages     = {437 -- 445},
  doi       = {10.1016/j.energy.2014.12.056},
  year      = {2015},
}