@Article{	  Colton.Giebermann.Monk:2000,
  author	= {Colton, D. and Giebermann, K. and Monk, P.},
  title		= {A regularized sampling method for solving three
		  dimensional inverse scattering problems },
  journal	= {SIAM J. Sci. Comput.},
  year		= 2000,
  volume	= {21},
  number	= {6},
  pages		= {2316-2330}
}