@techreport{commitment,
  author	= {Cohen, Philip R. and Levesque, Hector J.},
  month		= mar,
  year		= {1987},
  title		= {Persistence, Intention and Commitment},
  number	= {CSLI-87-88},
  address	= {Stanford, CA},
  institution	= {Center for the Study of Language and Information}
}