@incollection{Hopper79-aspect,
  author	= {Hopper, P. J.},
  editor	= {Giv{\`o}n, Talmy},
  year		= {1979},
  title		= {Aspect and foregrounding in discourse},
  booktitle	= {Syntax and Semantics 12: Discourse and syntax},
  publisher	= {Academic Press},
  address	= {New York},
  pages		= {213--241}
}