@misc{hoefler-mpi-forum-coll_wg-april-slides,
  author={Torsten Hoefler and Andrew Lumsdaine},
  title={{MPI-3 Collective Working Group - April'08 Meeting}},
  institution={Indiana University},
  year={2008},
  month={Apr.},
  location={Chicago, IL, USA},
  note={Slides with proposals to the MPI-3 collective WG, all preliminary, published on request},
}