@inproceedings{hoefler-sparsecolls-hips,
  author={Torsten Hoefler and Jesper Larsson Träff},
  title={{Sparse Collective Operations for MPI}},
  journal={},
  institution={},
  year={2009},
  month={May},
  pages={},
  volume={},
  number={},
  booktitle={Proceedings of the 23rd IEEE International Parallel \& Distributed Processing Symposium, HIPS'09 Workshop},
  location={Rome, Italy},
  publisher={},
  issn={1530-2075},
  isbn={978-1-4244-3750-4},
}