@ARTICLE{WoodsGibson08,
  author = {Woods, Damien and Gibson, {J. Paul}},
  title = {Lower bounds on the computational power of an optical model of computation},
  journal = {Natural Computing},
  year = {2008},
  volume = {7},
  pages = {95-108},
  number = {1},
  bibsource = {DBLP, http://dblp.uni-trier.de},
  doi = {10.1007/s11047-007-9039-7}
}