@article{JMLR:v11:krause10a,
  author  = {Andreas Krause},
  title   = {SFO: A Toolbox for Submodular Function Optimization},
  journal = {Journal of Machine Learning Research},
  year    = {2010},
  volume  = {11},
  number  = {38},
  pages   = {1141--1144},
  url     = {http://jmlr.org/papers/v11/krause10a.html}
}