@inproceedings{apgv2006wc,
  title = {The Effect of Warm and Cool Object Colors on Depth Ordering},
  author = {Reynold Bailey and Cindy Grimm and Christopher Davoli},
  booktitle = {Symposium on Applied Perception in Graphics and Visualization},
  pages = {161},
  publisher = {ACM},
  note = {A study on the effect of color on depth. A longer version can be found here.},
  month = {July},
  year = {2006}
}