@article{maxsumdiversificationmonotonesubmodular,
  title = {Max-Sum Diversification, Monotone Submodular Functions and Semi-metric Spaces},
  author = {Sepehr Abbasi Zadeh and Mehrdad Ghadiri},
  year = {2015},
  eprint = {1511.02402},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1511.02402v1},
}