@TechReport{	  it:2004-050,
  author	= {Stefan Johansson},
  title		= {High Order Summation by Parts Operator Based on a {DRP}
		  Scheme Applied to {2D} Aeroacoustics},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2004},
  number	= {2004-050},
  month		= oct,
  abstract	= {A strictly stable high order finite difference method
		  based on Tam and Webb's dispersion relation preserving
		  scheme in the interior has been verified for a 2D
		  aeroacoustic problem. Results show that the method gives
		  lower dispersion error than a similar method derived by
		  Strand, which is based on standard sixth order difference
		  approximation in the interior, when boundary effects are
		  not important.}
}