@INPROCEEDINGS{WoodsGibson05I,
  author = {Woods, Damien and Gibson, {J. Paul}},
  title = {Lower Bounds on the Computational Power of an Optical Model of Computation},
  booktitle = {{4th International Conference on Unconventional Computation (UC2005)}},
  year = {2005},
  editor = {Cristian Calude and Michael J. Dinneen and Gheorghe Paun and Mario
	J. P{\'e}rez-Jim{\'e}nez and Grzegorz Rozenberg},
  volume = {3699},
  series = {Lecture Notes in Computer Science},
  pages = {237-250},
  address = {Sevilla, Spain},
  publisher = {Springer},
  bibsource = {DBLP, http://dblp.uni-trier.de},
  doi = {10.1007/11560319_22},
  isbn = {3-540-29100-8}
}