@techreport{nbc-proposal-rev-6,
  author={Torsten Hoefler on behalf of the MPI Forum},
  title={{ MPI: A Message-Passing Interface Standard -- Working-Draft for Nonblocking Collective Operations}},
  institution={MPI Forum},
  year={2009},
  month={Apr.},
  pages={},
  volume={},
  number={},
  booktitle={},
  location={},
  publisher={MPI Forum},
  issn={},
  isbn={},
}