@article{Carlson-RadvanskyIrwin93,
  author	= {Carlson-Radvansky, L. A. and Irwin, D. E.},
  title		= {Frames of reference in vision and language: where is above?},
  journal	= {Cognition},
  year		= {1993},
  volume	= {46},
  pages		= {223--244}
}